GB600114A - Improvements in and relating to the synthesis of derivatives of stilbene and di-benzyl - Google Patents

Improvements in and relating to the synthesis of derivatives of stilbene and di-benzyl

Info

Publication number
GB600114A
GB600114A GB2602845A GB2602845A GB600114A GB 600114 A GB600114 A GB 600114A GB 2602845 A GB2602845 A GB 2602845A GB 2602845 A GB2602845 A GB 2602845A GB 600114 A GB600114 A GB 600114A
Authority
GB
United Kingdom
Prior art keywords
methyl
produce
dimethyl
derivative
followed
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.)
Expired
Application number
GB2602845A
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.)
Wellcome Foundation Ltd
Original Assignee
Wellcome Foundation Ltd
Filing date
Publication date
Application filed by Wellcome Foundation Ltd filed Critical Wellcome Foundation Ltd
Publication of GB600114A publication Critical patent/GB600114A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/45Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by condensation
    • C07C45/46Friedel-Crafts reactions
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/01Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis
    • C07C37/055Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis the substituted group being bound to oxygen, e.g. ether group
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C39/00Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
    • C07C39/205Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing only six-membered aromatic rings as cyclic parts with unsaturation outside the rings
    • C07C39/21Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing only six-membered aromatic rings as cyclic parts with unsaturation outside the rings with at least one hydroxy group on a non-condensed ring
    • C07C39/215Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing only six-membered aromatic rings as cyclic parts with unsaturation outside the rings with at least one hydroxy group on a non-condensed ring containing, e.g. diethylstilbestrol
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C43/00Ethers; Compounds having groups, groups or groups
    • C07C43/02Ethers
    • C07C43/20Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring
    • C07C43/205Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring the aromatic ring being a non-condensed ring
    • C07C43/2055Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring the aromatic ring being a non-condensed ring containing more than one ether bond
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Compounds of the general formula <FORM:0600114/IV(b)/1> in which R1, R2, R3, R4, R5 an R6 are each hydrogen or an alkyl group, and R1 or R3 or both R1 and R3 is or are an alkyl group or groups are obtained by carrying out a Grignard reaction upon the corresponding desoxybenzoin derivative to form the corresponding tertiary carbinol and if the dihydroxy compound is the desired product, followed by dealkylation. The corresponding dibenzyl derivatives are obtained by the hydrogenation of the dialkoxystilbene or dihydroxystilbene formed as above and if desired followed by dealkylation or by the direct reduction of the desoxybenzoin derivative. In examples: (1) 2-methyldesoxyanisoin is reduced with amalgamated zinc and concentrated hydrochloric acid to produce 2-methyl-4 : 41-dimethoxy-dibenzyl which is demethylated to produce 2-methyl-4 : 41-dihydroxydibenzyl; (2) ms : 2-dimethyldesoxyanisoin is treated as in example (1) to produce b - 2-dimethyl - 4 : 41 - dimethoxydibenzyl and b : 2-dimethyl - 4 : 41 - dihydroxydibenzyl; (3) 21-methyldesoxyanisoin is treated with a Grignard reagent and the product heated to produce b : 2 - dimethyl - 4 : 41 - dimethoxystilbene which is hydrogenated in the presence of palladized charcoal to the corresponding dibenzyl derivative; (4) b -ethyl-2-methyl-desoxyanisoin is converted by means of a Grignard reagent followed by dehydration of the product with phosphorous tribromide to b -ethyl-a : 2-dimethyl-4 : 41-dimethoxystilbene which is demethylated to the corresponding dihydroxystilbene. The corresponding dibenzyl compounds are obtained by hydrogenation; (5) ms : 2 : 21 - trimethyldesoxyanisoin is treated with a Grignard reagent and the product is dehydrated to produce a : b : 2 : 21-tetramethyl-4 : 41-dimethoxystilbene which on demethylation gives the corresponding dihydroxystilbene; (6) a : b : 2 : 21 - tetramethyl - 4 : 41 - dimethox - stilbene is hydrogenated in the presence of palladized charcoal to produce the corresponding dimethoxydibenzyl derivative which on demethylation gives the dihydroxydibenzyl derivative. 2-Methyl, 21-methyl and 2 : 21-dimethyldesoxy-anisoin are obtained by condensing the corresponding 4-methoxyphenylacetyl chloride with the corresponding anisole in the presence of aluminium chloride. ms : 2 - Dimethyl and b -ethyl-2-methyl-desoxy-anisoin are obtained by heating a solution of 2-methyldesoxyanisoin in ethanol with sodium ethoxide and methyl or ethyl iodide. 2-Phenyl-4-(21-methyl-41-methoxy-benzal)-5-oxazolone is obtained by heating together 2-methyl - 4 - methoxy - benzaldehyde, hippuric acid, sodium acetate and acetic anhydride. Methyl - 2 - methyl - 4 - methoxyphenylacetate is obtained from the oxazolone above by treatment with caustic soda followed by oxidation with hydrogen peroxide and esterification. 2 - Methyl - 4 - methoxyphenylacetic acid is obtained by hydrolysing the ester above. The acid chloride and amide are obtained on treatment with thionyl chloride and ammonia respectively.
GB2602845A 1945-10-05 Improvements in and relating to the synthesis of derivatives of stilbene and di-benzyl Expired GB600114A (en)

Publications (1)

Publication Number Publication Date
GB600114A true GB600114A (en) 1948-03-31

Family

ID=1739746

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2602845A Expired GB600114A (en) 1945-10-05 Improvements in and relating to the synthesis of derivatives of stilbene and di-benzyl

Country Status (1)

Country Link
GB (1) GB600114A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2165700A1 (en) * 1970-12-31 1972-07-20 Ibm Nematic substances

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2165700A1 (en) * 1970-12-31 1972-07-20 Ibm Nematic substances

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