CN1445215A - Photochemical method for synthesizing vitamine D3 - Google Patents

Photochemical method for synthesizing vitamine D3 Download PDF

Info

Publication number
CN1445215A
CN1445215A CN 02104444 CN02104444A CN1445215A CN 1445215 A CN1445215 A CN 1445215A CN 02104444 CN02104444 CN 02104444 CN 02104444 A CN02104444 A CN 02104444A CN 1445215 A CN1445215 A CN 1445215A
Authority
CN
China
Prior art keywords
reaction
polar solvent
dehydrocholesterol
vitamins
hour
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 02104444
Other languages
Chinese (zh)
Other versions
CN1196677C (en
Inventor
张宝文
程学新
刘颙颙
王雪松
曹怡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technical Institute of Physics and Chemistry of CAS
Original Assignee
Technical Institute of Physics and Chemistry of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technical Institute of Physics and Chemistry of CAS filed Critical Technical Institute of Physics and Chemistry of CAS
Priority to CN 02104444 priority Critical patent/CN1196677C/en
Publication of CN1445215A publication Critical patent/CN1445215A/en
Application granted granted Critical
Publication of CN1196677C publication Critical patent/CN1196677C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

A photochemical process for synthesizing VD3 includes such steps as dissolving 7-dehydrocholesterol in the mixture of polar solvent and non-polar solvent, adding antioxidizing agent, stirring, light radiating at 23-30 deg.C, evaporating, adding polar solvent, separating the unreacted 7-dehydrocholesterol, adding maleic acid anhydride and aqueous solution of KOH or NaOH while stirring to obtain viscose material, dissolving in refined oil, vacuum heating to 60-70 deg.C and vacuum relief. Its advantage is high output rate about 70%.

Description

The photochemistry synthesis of vitamin d 3Method
Technical field
The invention belongs to organic photochemistry synthetic field, particularly photochemistry synthesis of vitamin d 3Method.
Background technology
Vitamins D 3Be human health, domestic animal, poultry normal growth and breed one of requisite important VITAMIN, all need an amount of adding in food and the feed.Along with the raising of social development and people's living standard, vitamins D 3Reach at home and have market widely in the world, have only a few countries productions such as Germany, Switzerland at present in the world, cost an arm and a leg.China manufacturer once utilized tens of one kilowatt mercury lamp as light source, and ethanol is solvent, and the photochemical reaction temperature is more than 60 ℃, the concentration of reaction raw materials is no more than 2%, transformation efficiency is 100%, and by product is very many will finish the product purification with column chromatography, and productive rate has only about 30%.Because the photochemistry production technology does not pass a test, from China's vitamins D nineties 3Basic stopping production, required vitamins D 3Dependence on import.Photochemical reaction is unit process important in the medical pharmaceutical industry, and correlation technique also is the technological difficulties of some pharmaceutical production, solves vitamins D 3The photochemistry production technology also extend in the production of other drug, have great economy, social benefit.Vitamins D 3Synthetic be to be raw material with the 7-dehydrocholesterol, one step of illumination singlet state scission of link, thermal isomerization reaction and obtaining.But the secondary reaction of photoresponse is difficult to control, have at least 7 high pressure liquid chromatography that comprise raw material can detect isomer and generate, and one of them by product (tachysterol) is also poisonous, and purification of products is very difficult.Raw material in the product that obtains after people's illumination such as Eyley: tachysterol: product is 1: 2: 1.Adopt the way of column chromatography to separate (Eyley, S.C.; Willems, D.H.J.Chem.Soc., Chem.Commun., 1975,858).People such as Okabe adopt the method for twice illumination, and the light that adds spectral filter general<340nm wavelength when second time illumination filters, and adding triplet state photosensitizers changes tachysterol into Previtamin D 3, productive rate has only 46% (Okabe, M.; Sun, R.-C.; Scalone, M.; Jibilian, C.H.; Hutchings, S.D.J.Org.Chem., 1995,60,767-771).Also have other method,, earlier after the UV-light illumination with 254 nano wave lengths, add photosensitizers again and carry out the illumination second time, make the tachysterol of the illumination generation first time change Previtamin D into the wavelength of 350 nanometers as adopting the UV-light of single wavelength 3, obtain about 50% productive rate.The illumination system complexity that these researchs relate to, the aftertreatment trouble is difficult to realize industrialization (Kobayashi, T.; Yasumura, M.J.Nutr.Sci.Vitaminol., 1973,19,123-128; Sato, T.; Yamauchi, H.; Ogata, Y., Kunii, T.; Kagei, K.; Katsui, G.; Toyoshima, S.; Yasumura, M.; Kobayashi, T. J.Nutr.Sci.Vitaminol., 1980,26,545-556; Dauben, W.G.; Phillips, R.B. J.Am.Chem.Soc., 1982,104,355-356; Dauben, W.G.; Phillips, R.B., J.Am.Chem.Soc., 1982,104,5780-5781).In addition, the 7-dehydrocholesterol has profit amphipathic, and its solubleness is no more than 1% under the room temperature in general solvent, gives high-volume to produce and causes difficulty.
Summary of the invention
The objective of the invention is at the problems referred to above, utilize inner-immersed type nitrogen bubbling photochemical reactor, optimize reaction conditions, the generation of control photochemical reaction by product, the screening reaction solvent provides a kind of photochemistry synthesis of vitamin d 3Method.
Utilize the photochemical reaction synthesis of vitamin d of 7-dehydrocholesterol at present 3As follows:
We have at first carried out the experiment of the reaction kinetics of photochemistry of 7-dehydrocholesterol, and its reaction kinetics as shown in Figure 1.HPLC before the photoresponse analyzes, referring to Fig. 2.
Obtaining as drawing a conclusion from Fig. 1 kinetic Process Analysis: the photochemical product that is generated the illumination reaction is pre--vitamins D 3Extinction generation secondary light chemical reaction generates bright sterol of by product and tachysterol again.If 7-dehydrocholesterol transformation efficiency is too high, bright sterol of by product and tachysterol that the secondary light chemical reaction generates will increase greatly, not only greatly reduce vitamins D 3Productive rate, and give to separate purify and to have caused very big difficulty.When the transformation efficiency of 7-dehydrocholesterol is no more than 30% (area percent of showing the 7-dehydrocholesterol in HPLC is no more than 55%), both can obtain higher photochemical product pre--vitamins D 3, the concentration of bright sterol of by product and tachysterol also can be controlled under the lower level simultaneously, obtains ratio best in the suitability for industrialized production.
Photochemistry synthesis of vitamin d of the present invention 3Method, carry out as follows:
(1) illumination reaction of 7-dehydrocholesterol
The 7-dehydrocholesterol is dissolved in the nonpolar-polar solvent mixed system, at room temperature be made into the solution that concentration is 4-6wt%, wherein the volume ratio of non-polar solvent and polar solvent is 2: 1-10: 1, add oxidation inhibitor, the mol ratio of 7-dehydrocholesterol and oxidation inhibitor is 500: 1-2,000: 1, mix, be made into photochemical reaction liquid.Pouring reaction solution into put 450W well high voltage mercury lamp also leads in the inner-immersed type photochemical reactor of nitrogen.Turn on light and carry out illumination, the temperature of control photochemical reaction liquid under 23-30 ℃ condition, illumination reaction 10-20 minute.
(2) reclaim the 7-dehydrocholesterol
After finishing according to above-mentioned photochemical reaction, termination reaction, after the reaction solution usefulness rotatory evaporator evaporated under reduced pressure with step (1), add a certain amount of polar solvent, be configured to the solution that concentration is 20-30wt%, under-20 to-15 ℃ condition freezing 4-6 hour, unreacted 7-dehydrocholesterol all will be precipitated out this moment.Then this suspension liquid is filtered fast, unreacted 7-dehydrocholesterol is separated with reaction product.
(3) remove the poisonous component tachysterol
It is 15-25wt% that step (2) filtrate filtered is evaporated to concentration with rotatory evaporator.Content with each reaction product of high-pressure liquid phase chromatograph measuring.At room temperature add a certain amount of non-polar solvent and oxidation inhibitor, the concentration that makes solution is 10-20wt%, and with each the reaction product content addition that determines, the mol ratio that makes total reaction product and oxidation inhibitor is 200: 1-1000: 1.Temperature is controlled at 7-12 ℃, and stirring the mol ratio that adds down with tachysterol is 1.5: 1-2: 1 maleic anhydride, restir 1-2 hour.Be cooled to 0-3 ℃, slowly adding concentration is the aqueous solution of KOH or the NaOH of 45-55wt%, and wherein, the mol ratio of KOH or NaOH and maleic anhydride is 3: 1 to 5: 1, continues to stir 1-2 hour, pours separating funnel into and leaves standstill phase-splitting in 15-30 minute.After the phase-splitting, the 0.8-1.2 non-polar solvent aqueous phase extracted doubly with the oil phase volume merges non-polar solvent after the extraction and oil phase.Then divide the washing oil phase 2-4 time with oil phase cumulative volume 2-3 times the deionized water and the mixed solvent of polar solvent, the volume ratio of deionized water and polar solvent is 1: 3-1: 9.Above-mentioned oil phase evaporate to dryness must be removed the thick product of tachysterol.
(4) thermal isomerization reaction system vitamins D 3Finish
The thick product of step (3) is weighed, use the high-pressure liquid phase chromatograph measuring Previtamin D 3And vitamins D 3Content after, be dissolved in Previtamin D 3And vitamins D 3In the treated oil of content 8-10 times weight, be heated to 60-70 ℃ under the vacuum, slowly vacuum tightness brought up to the 2-3mmHg post, kept 3-4 hour, slowly cool to 28-35 ℃ then, kept original vacuum tightness 8-10 hour.Feed nitrogen and remove vacuum, get limpid high-quality vitamins D 3Finish.Purity is more than 95%.Yield is about 70%.
Each above step all will be carried out under nitrogen protection.
The present invention considers light transmission, do not influence singlet state reaction, low cost, and selected non-polar solvent comprises that boiling point is that 30-60 ℃, boiling point are 60-90 ℃ aliphatic solvents such as sherwood oil, hexanaphthene, normal hexane, pentamethylene, pentane or iso-pentane.Selected polar solvent comprises aliphatic solvents such as acetonitrile, methyl alcohol, ethanol or dioxane.
Described antioxidant is 2,6-di-t-butyl-p-methyl phenol or 2,6-di-t-butyl-p methoxy phenol etc.
Described treated oil is refining salad oil or refining peanut wet goods refined edible oil.
The present invention adopt transformation efficiency that mixed solvent guarantees high density, control 7-dehydrocholesterol 30% below, utilize the solubleness effect to reclaim unreacted 7-dehydrocholesterol conduct photochemical reaction raw material next time, improved reactant concn greatly, removed the toxic byproduct tachysterol with chemical process, both guaranteed photochemically reactive quantity, productive rate is improved greatly, thereby with vitamins D 3The productive rate of finish is brought up to about 70%, and production process is very easy.
Description of drawings
Fig. 1 .7-dehydrocholesterol (5wt%) sherwood oil (30-60 ℃)-ethanol (6: 1, V/V)
(the isomer percentage contains photochemical reaction with the products distribution of light application time in the mixed solvent
Amount is in the HPLC area percentage)
Fig. 2. the HPLC spectrogram among the embodiment 1 before the photoresponse
Fig. 3. the HPLC spectrogram among the embodiment 1 after the photoresponse
Fig. 4. reclaim the HPLC spectrogram of 7-dehydrocholesterol among the embodiment 1
Fig. 5. reclaim the HPLC spectrogram of 7-dehydrocholesterol rear filtrate among the embodiment 1
Fig. 6. the HPLC spectrogram among the embodiment 1 behind the removal tachysterol
Fig. 7. vitamins D among the embodiment 1 3The HPLC spectrogram of finish
Specific embodiment
Utilize inner-immersed type nitrogen bubbling photochemical reactor and Beijing Electrooptic Source Inst's high voltage mercury lamp system.
Embodiment 1.
(1) illumination reaction of .7-dehydrocholesterol
In flask at the bottom of 500 milliliters of gardens, with 16.5 gram 7-dehydrocholesterols be dissolved in 330 milliliters of sherwood oils (30-60 ℃)-ethanol (6: 1, V/V) in the mixed solvent, add 10 milligram 2,6-di-t-butyl-p methoxy phenol mixes with magnetic, the photochemical reaction liquid that is configured to.Reaction solution is inserted in the inner-immersed type photochemical reactor of putting 450 watts of high voltage mercury lamps (GGZ1000-1 of Beijing Electrooptic Source Inst) and logical nitrogen well.Regulate the flow of nitrogen, make bubble even.Start mercury lamp, and timing.Reaction unit is put into lighttight ventilating kitchen, and an electric fan, guarantees that the temperature of photochemical reaction liquid is no more than 28 ℃, to avoid generating vitamins D too early in photochemical reaction process 3With high pressure liquid chromatography (HPLC) method monitoring reaction (instrument: HitachiL-7100; Dalian Yi Lite Spher SiO 2Normal phase column, particle diameter 5 μ, the diameter=4.6mm of post, column length 250mm; Moving phase: normal hexane/amylalcohol=997/3, V/V; Flow velocity: 2 ml/min; 254nm detects.The retention time that contrasts each isomer with standard specimen is approximately: pre--vitamins D 3-7 minutes, bright sterol-10 minute, vitamins D 3-14 minutes, tachysterol-15 minute, 7-dehydrocholesterol-21 minute, retention time change with condition slightly change), reacted 15 minutes.
(2). reclaim the 7-dehydrocholesterol
After above-mentioned photochemical reaction finished, its HPLC analyzed and is shown in Fig. 3.Reaction solution poured at the bottom of 500 milliliters of gardens rotate evaporate to dryness in the flask, add 60 milliliters of ethanol then, insert-20 ℃ refrigerator and cooled and freeze and spend the night.Filter fast freezing back, gets solid 7-dehydrocholesterol 12.1 grams (can be used as next photoresponse raw material), and its HPLC analyzes and is shown in Fig. 4, substantially pure.The HPLC of filtrate analyzes and is shown in Fig. 5.
(3). remove the poisonous component tachysterol
With the content of high pressure liquid chromatograph detection tachysterol, see Fig. 5.The content that therefrom can calculate tachysterol is 0.79 gram, must remove.Filtrate is concentrated into 20 milliliters, adds 8 milliliters of sherwood oils and 5 milligram 2 again, 6-di-t-butyl-p methoxy phenol is controlled at 10 ℃ with temperature, stirs to add 0.40 gram maleic anhydride, restir 1 hour down.Be cooled to 1 ℃, slowly add 1.6 milliliter 50% the KOH aqueous solution, continue to stir 1 hour, pour separating funnel into and leave standstill layering in 20 minutes.After the layering, with 8 milliliters of petroleum ether extraction waters, sherwood oil after the extraction and oil phase being merged, is that (1/4, V/V) the mixed solvent washing oil is 3 times mutually for 36 ml deionized water/ethanol with total amount then.The HPLC of oil phase analyzes and is shown in Fig. 6, and tachysterol is removed substantially.Above-mentioned oil phase evaporate to dryness is got thick product 4.2 grams.
(4). thermal isomerization reaction system vitamins D 3Finish
The thick product of step (3) is dissolved in 27 gram treated oils, vacuumized (2mmHg) 4 hours under 70 ℃, slowly cool to 35 ℃ and took out again 8 hours.Remove vacuum, get limpid high-quality vitamins D 3Finish 30.2 grams are analyzed the gram into 412I.U/, total recovery 70.7%.Its HPLC analyzes and is shown in Fig. 7.Its pre--vitamins D 3And vitamins D 3(P+D) total content is higher than 95%, does not contain tachysterol substantially, can be used as food or fodder additives.
Embodiment 2.
(1) illumination reaction of .7-dehydrocholesterol
In flask at the bottom of 500 milliliters of gardens, with 16.5 gram 7-dehydrocholesterols be dissolved in 330 milliliters of pentane-methyl alcohol (6: 1, V/V) in the mixed solvent, add 10 milligram 2,6-di-t-butyl-p methoxy phenol mixes with magnetic, the photochemical reaction liquid that is configured to.Reaction solution is inserted in the inner-immersed type photochemical reactor of putting 450 watts of high voltage mercury lamps (with embodiment 1) and logical nitrogen well.Regulate the flow of nitrogen, make bubble even.Start mercury lamp, and timing.Reaction unit is put into lighttight ventilating kitchen, and an electric fan, guarantees that the temperature of photochemical reaction liquid is no more than 28 ℃, to avoid generating vitamins D too early in photochemical reaction process 3With high pressure liquid chromatography (HPLC) method monitoring reaction (condition is with embodiment 1), reacted 15 minutes.
(2). reclaim the 7-dehydrocholesterol
After above-mentioned photochemical reaction finishes.Reaction solution poured at the bottom of 500 milliliters of gardens rotate evaporate to dryness in the flask, add 60 ml methanol then, insert-20 ℃ refrigerator and cooled and freeze and spend the night.Filter fast freezing back, gets solid 7-dehydrocholesterol 12.5 grams (can be used as next photoresponse raw material).
(3). remove the poisonous component tachysterol
With the content of high pressure liquid chromatograph detection tachysterol, the content that calculates tachysterol is 0.75 gram.Filtrate is concentrated into 20 milliliters, adds 8 milliliters of pentanes and 5 milligram 2 again, 6-di-t-butyl-p methoxy phenol is controlled at 10 ℃ with temperature, stirs to add 0.37 gram maleic anhydride, restir 1 hour down.Be cooled to 0 ℃, slowly add 1.6 milliliter 50% the KOH aqueous solution, continue to stir 1 hour, pour separating funnel into and leave standstill layering in 20 minutes.After the layering, with 8 milliliters of pentane aqueous phase extracted, pentane after the extraction and oil phase being merged, is that (1/4, V/V) the mixed solvent washing oil is 3 times mutually for 36 ml deionized water/methyl alcohol with total amount then.Above-mentioned oil phase evaporate to dryness is got thick product 3.9 grams.
(4). thermal isomerization reaction system vitamins D 3Finish
The thick product of step (3) is dissolved in 24 gram treated oils, and 70 ℃ of following vacuum (2mmHg) were taken out 4 hours, slowly cooled to 35 ℃ and took out 8 hours again.Remove vacuum, get limpid high-quality vitamins D 3Finish 26.9 grams, analysis are 421 I.U/ grams, total recovery 70.8%.Its pre--vitamins D 3And vitamins D 3(P+D) total content is higher than 95%, does not contain tachysterol substantially, can be used as food or fodder additives.
Embodiment 3.
(1) illumination reaction of .7-dehydrocholesterol
In flask at the bottom of 500 milliliters of gardens, with 16.5 gram 7-dehydrocholesterols be dissolved in 330 milliliters of hexane-dioxane (6: 1, V/V) in the mixed solvent, add 10 milligram 2,6-di-t-butyl-p methoxy phenol mixes with magnetic, the photochemical reaction liquid that is configured to.Reaction solution is inserted in the inner-immersed type photochemical reactor of putting 450 watts of high voltage mercury lamps (with embodiment 1) and logical nitrogen well.Regulate the flow of nitrogen, make bubble even.Start mercury lamp, and timing.Reaction unit is put into lighttight ventilating kitchen, and an electric fan, guarantees that the temperature of photochemical reaction liquid is no more than 28 ℃, to avoid generating vitamins D too early in photochemical reaction process 3With high pressure liquid chromatography (HPLC) method monitoring reaction (condition is with embodiment 1), reacted 15 minutes.
(2). reclaim the 7-dehydrocholesterol
After above-mentioned photochemical reaction finishes.Reaction solution poured at the bottom of 500 milliliters of gardens rotates evaporate to dryness in the flask, after add 60 milliliters of dioxane, insert-20 ℃ refrigerator and cooled and freeze and spend the night.Filter fast freezing back, gets solid 7-dehydrocholesterol 11.7 grams (can be used as next photoresponse raw material).
(3). remove the poisonous component tachysterol
Detect the content of tachysterol with high pressure liquid chromatograph.The content that calculates tachysterol is 0.85 gram.Filtrate is concentrated into 20 milliliters, adds 8 milliliters of hexanes and 5 milligram 2 again, 6-di-t-butyl-p methoxy phenol is controlled at 10 ℃ with temperature, stirs to add 0.40 gram maleic anhydride, restir 1 hour down.Be cooled to 0 ℃, slowly add 1.6 milliliter 50% the KOH aqueous solution, continue to stir 1 hour, pour separating funnel into and leave standstill layering in 20 minutes.After the layering, with 8 milliliters of hexane extraction waters, hexane after the extraction and oil phase being merged, is that (1/4, V/V) the mixed solvent washing oil is 3 times mutually for 36 ml deionized water/dioxane with total amount then.Above-mentioned oil phase evaporate to dryness is got thick product 4.5 grams.
(4). thermal isomerization reaction system vitamins D 3Finish
The thick product of step (3) is dissolved in 27 gram treated oils, and 70 ℃ of following vacuum (2mmHg) were taken out 4 hours, slowly cooled to 35 ℃ and took out 8 hours again.Remove vacuum, get limpid high-quality vitamins D 3Finish 30.6 grams, analysis are 434 I.U/ grams, total recovery 69.2%.Its pre--vitamins D 3And vitamins D 3(P+D) total content is higher than 95%, does not contain tachysterol substantially, can be used as food or fodder additives.
Embodiment 4.
(1) illumination reaction of 1.7-dehydrocholesterol
In flask at the bottom of 500 milliliters of gardens, with 16.5 gram 7-dehydrocholesterols be dissolved in 330 milliliters of hexanaphthene-acetonitriles (6: 1, V/V) in the mixed solvent, add 10 milligram 2,6-di-t-butyl-p methoxy phenol mixes with magnetic, the photochemical reaction liquid that is configured to.Reaction solution is inserted in the inner-immersed type photochemical reactor of putting 450 watts of high voltage mercury lamps (with embodiment 1) and logical nitrogen well.Regulate the flow of nitrogen, make bubble even.Start mercury lamp, and timing.Reaction unit is put into lighttight ventilating kitchen, and an electric fan, guarantees that the temperature of photochemical reaction liquid is no more than 28 ℃, to avoid generating vitamins D too early in photochemical reaction process 3With high pressure liquid chromatography (HPLC) method monitoring reaction (condition is with embodiment 1), reacted 15 minutes.
(2). reclaim the 7-dehydrocholesterol
After above-mentioned photochemical reaction finishes.Reaction solution poured at the bottom of 500 milliliters of gardens rotates evaporate to dryness in the flask, after add 60 milliliters of acetonitriles, insert-20 ℃ refrigerator and cooled and freeze and spend the night.Filter fast freezing back, gets solid 7-dehydrocholesterol 11.9 grams (can be used as next photoresponse raw material).
(3). remove the poisonous component tachysterol
Detect the content of tachysterol with high pressure liquid chromatograph.The content that calculates tachysterol is 0.82 gram.Filtrate is concentrated into 20 milliliters, adds 8 milliliters of hexanaphthenes and 5 milligram 2 again, 6-di-t-butyl-p methoxy phenol is controlled at 10 ℃ with temperature, stirs to add 0.40 gram maleic anhydride, restir 1 hour down.Be cooled to 0 ℃, slowly add 1.6 milliliter 50% the KOH aqueous solution, continue to stir 1 hour, pour separating funnel into and leave standstill layering in 20 minutes.After the layering, with 8 milliliters of hexanaphthene aqueous phase extracted, hexanaphthene after the extraction and oil phase being merged, is that (1/4, V/V) the mixed solvent washing oil is 3 times mutually for 36 ml deionized water/acetonitrile with total amount then.Above-mentioned oil phase evaporate to dryness is got thick product 4.4 grams.
(4). thermal isomerization reaction system vitamins D 3Finish
The thick product of step 3 is dissolved in 27 gram treated oils, and 70 ℃ of following vacuum (2mmHg) were taken out 4 hours, slowly cooled to 35 ℃ and took out 8 hours again.Remove vacuum, get limpid high-quality vitamins D 3Finish 30.4 grams are analyzed the gram into 425I.U/, total recovery 70.2%.Its pre--vitamins D 3And vitamins D 3(P+D) total content is higher than 95%, does not contain tachysterol substantially, can be used as food or fodder additives.

Claims (9)

1. photochemistry synthesis of vitamin d 3Method, it is characterized in that: this method is carried out as follows:
(1) illumination reaction of 7-dehydrocholesterol
The 7-dehydrocholesterol is dissolved in the nonpolar-polar solvent mixed system, at room temperature be made into the solution that concentration is 4-6wt%, wherein the volume ratio of non-polar solvent and polar solvent is 2: 1-10: 1, add oxidation inhibitor, the mol ratio of 7-dehydrocholesterol and oxidation inhibitor is 500: 1-2,000: 1, mix, be made into photochemical reaction liquid; Reaction solution is poured in the photochemical reactor that leads to nitrogen, carried out illumination, the temperature of control photochemical reaction liquid is at 23-30 ℃;
(2) reclaim the 7-dehydrocholesterol
Behind the reaction solution evaporate to dryness with step (1), add polar solvent, be made into the solution that concentration is 20-30wt%, freezing under-20 to-15 ℃ condition, this suspension liquid is filtered fast, unreacted 7-dehydrocholesterol is separated with reaction product;
(3) remove the poisonous component tachysterol
It is 15-25wt% that step (2) filtrate filtered is concentrated into concentration, measure the content of each reaction product, at room temperature add non-polar solvent and oxidation inhibitor, the concentration that makes solution is 10-20wt%, with each the reaction product content addition that determines, the mol ratio that makes total reaction product and oxidation inhibitor is 200: 1-1000: 1; Temperature is controlled at 7-12 ℃, stirring the mol ratio that adds down with tachysterol is 1.5: 1-2: 1 maleic anhydride, continue to stir, be cooled to 0-3 ℃, slowly adding concentration is the aqueous solution of KOH or the NaOH of 45-55wt%, and wherein, the mol ratio of KOH or NaOH and maleic anhydride is 3: 1 to 5: 1, continue to stir, pour separating funnel into and leave standstill the back phase-splitting; After the phase-splitting, use the non-polar solvent aqueous phase extracted, non-polar solvent after the extraction and oil phase are merged,, above-mentioned oil phase evaporate to dryness must be removed the thick product of tachysterol then with the mixed solvent washing oil phase of deionized water and polar solvent;
(4) thermal isomerization reaction system vitamins D 3Finish
The thick product of step (3) is weighed, measure Previtamin D 3And vitamins D 3Content after, be dissolved in Previtamin D 3And vitamins D 3In the treated oil of content 8-10 times weight, be heated to 60-70 ℃ under the vacuum, slowly vacuum tightness brought up to the 2-3mmHg post, kept 3-4 hour, slowly cool to 28-35 ℃ then, keep original vacuum tightness, feed nitrogen and remove vacuum, get limpid high-quality vitamins D 3Finish;
Each above step all will be carried out under nitrogen protection.
2. the method for claim 1, it is characterized in that: the light source in the described step (1) is the high voltage mercury lamp of 450W, illumination reaction 10-20 minute.
3. the method for claim 1 is characterized in that: described step (2) under-20 to-15 ℃ condition freezing 4-6 hour.
4. the method for claim 1 is characterized in that: stirred 1-2 hour behind described step (3) the adding maleic anhydride; The aqueous solution that adds KOH or NaOH continues to stir 1-2 hour.
5. the method for claim 1, it is characterized in that: described step (4) is brought up to the 2-3mmHg post with vacuum tightness, keeps 3-4 hour, cools to 28-35 ℃, keeps original vacuum tightness 8-10 hour.
6. the method for claim 1, it is characterized in that: described non-polar solvent comprises that boiling point is 30-60 ℃ sherwood oil, sherwood oil, hexanaphthene, normal hexane, pentamethylene, pentane or the iso-pentane that boiling point is 60-90 ℃.
7. the method for claim 1, it is characterized in that: described polar solvent comprises acetonitrile, methyl alcohol, ethanol or dioxane.
8. the method for claim 1, it is characterized in that: described antioxidant is 2,6-di-t-butyl-p-methyl phenol or 2,6-di-t-butyl-p methoxy phenol.
9. the method for claim 1 is characterized in that: described treated oil is refining salad oil or refining peanut oil.
CN 02104444 2002-03-18 2002-03-18 Photochemical method for synthesizing vitamine D3 Expired - Fee Related CN1196677C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02104444 CN1196677C (en) 2002-03-18 2002-03-18 Photochemical method for synthesizing vitamine D3

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02104444 CN1196677C (en) 2002-03-18 2002-03-18 Photochemical method for synthesizing vitamine D3

Publications (2)

Publication Number Publication Date
CN1445215A true CN1445215A (en) 2003-10-01
CN1196677C CN1196677C (en) 2005-04-13

Family

ID=27810883

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 02104444 Expired - Fee Related CN1196677C (en) 2002-03-18 2002-03-18 Photochemical method for synthesizing vitamine D3

Country Status (1)

Country Link
CN (1) CN1196677C (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1307154C (en) * 2004-08-10 2007-03-28 中国科学院理化技术研究所 Method for photochemosynthesis of vitamin D2
CN100582118C (en) * 2006-08-04 2010-01-20 浙江新和成股份有限公司 Method for preparing 7-dehydrogenation cholesterol
CN101085755B (en) * 2007-06-22 2011-12-07 厦门金达威集团股份有限公司 Actinic chemistry reaction device and method for synthesizing provitamin D3
CN102276510A (en) * 2011-05-30 2011-12-14 何德海 Technological method for preparing vitamin D3
CN101381336B (en) * 2007-09-06 2012-07-04 浙江新和成股份有限公司 Vitamin D3 preparation method and device
CN102850248A (en) * 2012-09-29 2013-01-02 浙江花园生物高科股份有限公司 Technology for preparing vitamin D3
CN103044301A (en) * 2011-10-17 2013-04-17 中国科学院理化技术研究所 Photochemical synthesis method of 25-hydroxy vitamin D3
CN103553993A (en) * 2013-11-12 2014-02-05 中国科学院理化技术研究所 Method for synthesizing resinous vitamin D3 by using micro-flow photoreaction technology and micro-flow photochemical reactor
CN109761867A (en) * 2019-02-28 2019-05-17 四川健腾生物技术有限公司 One kind producing vitamin D by raw material of lanolin3New industrial process
CN111960980A (en) * 2019-05-20 2020-11-20 重庆桑禾动物药业有限公司 Method for synthesizing pre-vitamin D3 by using LED ultraviolet lamp
CN112979738A (en) * 2021-03-02 2021-06-18 浙江新和成股份有限公司 Crystallization purification method of 7-dehydrocholesterol and application thereof in VD3 production

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1307154C (en) * 2004-08-10 2007-03-28 中国科学院理化技术研究所 Method for photochemosynthesis of vitamin D2
CN100582118C (en) * 2006-08-04 2010-01-20 浙江新和成股份有限公司 Method for preparing 7-dehydrogenation cholesterol
CN101085755B (en) * 2007-06-22 2011-12-07 厦门金达威集团股份有限公司 Actinic chemistry reaction device and method for synthesizing provitamin D3
CN101381336B (en) * 2007-09-06 2012-07-04 浙江新和成股份有限公司 Vitamin D3 preparation method and device
CN102276510A (en) * 2011-05-30 2011-12-14 何德海 Technological method for preparing vitamin D3
CN103044301B (en) * 2011-10-17 2014-12-03 中国科学院理化技术研究所 Photochemical synthesis method of 25-hydroxy vitamin D3
CN103044301A (en) * 2011-10-17 2013-04-17 中国科学院理化技术研究所 Photochemical synthesis method of 25-hydroxy vitamin D3
CN102850248A (en) * 2012-09-29 2013-01-02 浙江花园生物高科股份有限公司 Technology for preparing vitamin D3
CN103553993A (en) * 2013-11-12 2014-02-05 中国科学院理化技术研究所 Method for synthesizing resinous vitamin D3 by using micro-flow photoreaction technology and micro-flow photochemical reactor
CN103553993B (en) * 2013-11-12 2015-05-20 中国科学院理化技术研究所 Method for synthesizing resinous vitamin D3 by using micro-flow photoreaction technology and micro-flow photochemical reactor
CN109761867A (en) * 2019-02-28 2019-05-17 四川健腾生物技术有限公司 One kind producing vitamin D by raw material of lanolin3New industrial process
CN111960980A (en) * 2019-05-20 2020-11-20 重庆桑禾动物药业有限公司 Method for synthesizing pre-vitamin D3 by using LED ultraviolet lamp
CN112979738A (en) * 2021-03-02 2021-06-18 浙江新和成股份有限公司 Crystallization purification method of 7-dehydrocholesterol and application thereof in VD3 production
CN112979738B (en) * 2021-03-02 2022-04-05 浙江新和成股份有限公司 Crystallization purification method of 7-dehydrocholesterol and application thereof in VD3 production

Also Published As

Publication number Publication date
CN1196677C (en) 2005-04-13

Similar Documents

Publication Publication Date Title
CN1196677C (en) Photochemical method for synthesizing vitamine D3
CN1031705C (en) 24-homo-Vitamin-0-derivatives, process for preparing them, pharmaceutical preparation containing them and use as pharmaceuticals
JP3854765B2 (en) Method for purifying long-chain dicarboxylic acids
EP2410030B1 (en) Preparation method of pimaric acid type resin acid
CN1246306C (en) New method for preparing brufen arginine salt
CN109232178B (en) Novel method for preparing high-purity hydroxytyrosol
CN103044301B (en) Photochemical synthesis method of 25-hydroxy vitamin D3
CN1754876A (en) Process for preparing high purity letrozole
CN102850248A (en) Technology for preparing vitamin D3
CN1307154C (en) Method for photochemosynthesis of vitamin D2
Baldwin et al. Free radical macrocyclisation via propiolate esters.
CN1021228C (en) Improved vancomycin precipitation process
CN108774290B (en) Resveratrol-carboxyalkyl cyclodextrin derivative and preparation method thereof
CN108239091B (en) Resolution of 1-cyclohexyl-2- (5H-imidazo [5,1-a ] isoindol) ethyl-1-one
CN101037445A (en) Imidazo [2,1-b]-1,3,4-thiadiazole derivatives having potential biological activity and synthesizing method thereof
CN1308289C (en) Synthesis method for water-soluble bisamide oxide
CN1566080A (en) Resolution of DL-phenylalanine
TWI301483B (en)
CN104447447A (en) Novel compound and methods for preparing and eliminating same
CN1030763C (en) Method for obtaining a mixture of higher aliphatic alcohols from sugar cane wax
CN101487032B (en) Production method for extracting bilirubin by promoting degradation by animal blood in vitro enzyme
JP6894945B2 (en) Lubiprostone crystals and their preparation methods
CN1082045C (en) Synthetic method of a-benzoin oxime
CN109516899B (en) Preparation method of high-purity resveratrol
CN1226260C (en) Method for synthesizing deca-isoprene alcohol

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20050413

Termination date: 20120318