EP4038074A1 - Nouveaux alcynylaminoboranes, leur methode de preparation et leurs utilisations - Google Patents
Nouveaux alcynylaminoboranes, leur methode de preparation et leurs utilisationsInfo
- Publication number
- EP4038074A1 EP4038074A1 EP20780756.1A EP20780756A EP4038074A1 EP 4038074 A1 EP4038074 A1 EP 4038074A1 EP 20780756 A EP20780756 A EP 20780756A EP 4038074 A1 EP4038074 A1 EP 4038074A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- group
- carbon atoms
- formula
- groups
- branched
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
- C07F5/027—Organoboranes and organoborohydrides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
Definitions
- the present invention relates to novel alkynylaminoboranes, their method of preparation and their uses.
- Alkynylaminoboranes are compounds exhibiting both the characteristics of alkynylboranes and aminoboranes.
- Alkynylboranes and their derivatives are synthetic intermediates used in many synthetic strategies. These organoboronates allow for example the introduction of aryl, alkenyl or alkynyl groups on synthesis intermediates through reactions catalyzed by transition metals. They are used in coupling, cyclization, cycloisomerization or polymerization reactions, which can be regioselective.
- These compounds can be prepared by deprotonation of the terminal alkyne with a strong base (organomagnesium and organolithium) in a stoichiometric amount and the addition of a borylation agent, such as chloroaminoborane (J. Org. Chem. 1995, 489, 51-62) or such as an alkyl borate (US 2011-0201806).
- a strong base organomagnesium and organolithium
- a borylation agent such as chloroaminoborane (J. Org. Chem. 1995, 489, 51-62) or such as an alkyl borate (US 2011-0201806).
- a stoichiometric amount of a base causes the formation of salts, which leads to a loss of yield and to obtaining a product of low purity.
- Alkynylboranes can be obtained by dehydrogenating coupling using transition metals (Advanced Synthesis & Catalysis, 2018, 360, 19, 3649-3654; J. Org. Chem. 829, 11-13) or pinacol-borane (Chemical Science , 2015, 6 (11), 6572-6582).
- transition metals Advanced Synthesis & Catalysis, 2018, 360, 19, 3649-3654; J. Org. Chem. 829, 11-13
- pinacol-borane Chemical Science , 2015, 6 (11), 6572-6582).
- these reagents are expensive and they require working under drastic conditions (control of the addition of reagents, temperature control).
- a method for obtaining known aminoboranes is that described in patent EP 1 458 729.
- the method described in this patent comprises the reaction between diisopropylaminoborane (DIPOB) of formula (iPr) 2 NBH 2 and a compound of formula AX, wherein A may be an alkynyl group and X is a halogenated leaving group, in the presence of a palladium catalyst.
- DIPOB diisopropylaminoborane
- AX is a halogenated leaving group
- the process described in this document is carried out in two steps distinct and requires on the one hand a transformation reaction to obtain the DIPOB by heating, and on the other hand the use of an expensive metal catalyst to prepare the aminoborane, which limits its use on an industrial scale.
- the alkynyl function carried by the group A is not reactive during the process described.
- a first aspect of the present invention is a process for preparing alkynylaminoboranes with a process requiring a single synthetic step.
- a second aspect of the present invention is the production of new alkynylaminoborane compounds.
- a third aspect of the present invention is the use of aminoborans for the preparation of alkynylaminoborans in a single synthetic step.
- a fourth aspect of the present invention is the use of an organomagnesium agent for the preparation of alkynylaminoborans.
- a fifth aspect of the present invention is the use of alkynylaminoboranes as reaction intermediates for coupling or multistage syntheses.
- the present invention relates to a process for preparing an alkynylaminoborane of formula (I) below: where R is:
- alkenyl or alkynyl group of 2 to 18 carbon atoms linear or branched, optionally carrying at least one substituent
- aryl group of 2 to 12 carbon atoms where the aryl is chosen from the group of aromatics or heteroaromatics, optionally carrying at least one substituent
- halogen chosen from F, Cl, Br and I
- R a , R , R c and R d which are identical or different represent H, Cl atoms, alkyl, alkenyl, linear or branched alkynyl, cycloalkyl, cycloalkenyl, aryl, in particular phenyl, or aromatic or non-aromatic heterocyclic groups, from 1 to 18 carbon atoms, optionally carrying at least one substituent, where said substituents are chosen from:
- n is an integer from 1 to 3
- Ri and R 2 are identical or different groups, chosen from:
- R 3 is an alkyl group of 1 to 18 carbon atoms, linear, branched or cyclical,
- the two groups R and R 2 can optionally be linked to form a cycle together, comprising bringing into contact in a single synthesis step:
- Ri and R 2 are chosen to allow steric hindrance with respect to the amine function equivalent to that of diisopropylaminoborane (DIPOB) of formula BH 2 -N (iPr) 2 ,
- - X is a halogen selected from the group comprising F, Cl, Br and I
- aryl an alkyl aryl, where the aryl is chosen from the group of aromatics or heteroaromatics.
- the method according to the invention uses an organomagnesium agent as a catalyst.
- An organomagnesium is not a complex of a transition metal.
- R is a C1 alkyl group
- R is a -CH 3 group if n is equal to 1
- R is a -CH 2 - group if n is equal to 2
- R is a CH- group if n is equal to 3.
- R is a C2 alkynyl group
- R is a CHoC- group if n is equal to 1
- R is a -CoC- group if is equal to 2 and the valence n cannot be equal to 3, because the R group cannot not carry three alkynylaminoborane functions.
- the group R is a silyl group -SiR a RR c in which R a , R and R c which are identical or different represent H, Cl atoms, alkyl groups from 1 to 18 carbon atoms or phenyls.
- steric hindrance vis-à-vis the amine function equivalent to that of diispropylaminoborane is meant within the meaning of the invention a steric hindrance similar to that provided by two isopropyl substituents preventing by their arrangement and their volume the approach of 'a reagent on the amine function.
- This bulk, a priori should be quantifiable by appropriate techniques (tolman angle, NB distance).
- the desired bulk has the effect of allowing the aminoborane, in solution, to be present in an amount of at least 10% in monomeric form.
- the process according to the present invention is carried out in a single synthesis step, i.e. a so-called one-pot procedure, using low-cost raw materials (alkyne, metals such as magnesium, aminoboranes or amine-borane complexes) which allow the implementation of the reaction on an industrial scale.
- low-cost raw materials alkyne, metals such as magnesium, aminoboranes or amine-borane complexes
- the aminoborane is chosen from the group comprising diisopropylaminoborane (DIPOB), dicyclohexylaminoborane, tetramethylpiperidine aminoborane (tmp-BH 2 ), ter-butylmethylaminoborane (tBuMeN- BH 2 ).
- DIPOB diisopropylaminoborane
- tmp-BH 2 dicyclohexylaminoborane
- tmp-BH 2 tetramethylpiperidine aminoborane
- tBuMeN- BH 2 ter-butylmethylaminoborane
- the aminoborane has identical groups and R 2.
- n is equal to 1, 2 or 3, preferably n is equal to 1.
- the invention relates to a process for the preparation of alkynylaminoborane of formula (I), in which and R 2 are isopropyl groups, said alkynylaminoborane corresponding to the following formula (II): in which R and n have the meanings indicated above, and said aminoborane is diisopropylaminoborane (DIPOB) of formula BH 2 -N (iPr) 2 ,
- DIPOB diisopropylaminoborane
- the organomagnesium is selected from PhMgBr, VinylMgBr, EtMgBr, MeMgBr, iPrMgBr, iPrMgCI, and is preferably PhMgBr.
- the aminoborane used in the process of the invention can be obtained commercially or synthetically. It can also be generated from an amine-borane complex during the alkyne borylation reaction in the single step of the process according to the invention.
- amine-borane complex of formula H 3 B ⁇ - NHR 1 R 2 is understood to mean a compound comprising a BH 3 group whose vacant p orbital is filled with the electron pair d. 'an amine NHR 1 R 2 .
- DIPAB diisopropylamine-borane
- the aminoborane of formula BH 2 -NR 1 R 2 is formed in situ during the single synthesis step, by dehydrogenation reaction of an amine-borane complex of formula BH 3 ⁇ - NHR 1 R 2 and an organomagnesium.
- the organomagnesium agent catalyzes the dehydrogenation reaction of the amine-borane complex, forming aminoborane, according to the following reaction scheme:
- the term “formed in situ” is understood to mean the fact that the aminoborane is formed directly during the implementation of the process by mixing the amine-borane complex and an organomagnesium agent in the single synthesis step.
- This organomagnesium can be chosen identical to that R'-MgX used in the parallel reaction of borylation of the terminal alkyne.
- the process of the invention can thus be carried out in a single simultaneous step of formation of the aminoborane and of borylation of the alkyne.
- the reaction report can be schematized as follows: n BH 3 -NHR t F3 ⁇ 4 R'-MgX allows the borylation reaction of the alkyne.
- the organomagnesium allows the continuous in situ supply of the aminoborane by dehydrogenation of the amine-borane complex.
- Amine-borane complexes are known for their stability to water, air and light. It is thus possible to select amine-borane complexes, some of which are more chemically stable and / or commercially available than their aminoborane counterparts.
- the organomagnesium agent used for the in-situ generation of the aminoborane from the amine-borane complex is a Grignard reagent of formula R'MgX in which X and R ' have the meanings indicated above, preferably PhMgBr or CH 3 MgBr.
- the organomagnesium agents for the borylation reaction of the alkyne and the in-situ generation of the aminoborane are identical and consist of a Grignard reagent. Thus, a single organomagnesium agent is introduced into the process of the invention.
- This organomagnesium allows both the dehydrogenation of the amine-borane complex to aminoborane and the borylation reaction of the terminal alkyne.
- the introduction of the same organomagnesium compound makes it possible to limit the nature and the quantity of catalyst used and thus to avoid parasitic cross reactions.
- the aminoborane is diisopropylaminoborane (DIPOB) of formula BH 2 -N (iPr) 2 , formed in situ during the single synthesis step.
- DIPOB is formed by dehydrogenation reaction of the diisopropylamine-borane complex (DIPAB) of formula H 3 B ⁇ - NH (iPr) 2 by an organomagnesium, preferably PhMgBr or CH 3 MgBr.
- the organomagnesium is a Grignard reagent of formula R'-MgX in which X and R 'have the meanings indicated above.
- R'-MgX is preferably PhMgBr or CH 3 MgBr.
- the process is carried out in the absence of a transition metal type catalyst.
- the process according to the invention advantageously makes it possible to dispense with the use of a transition metal type catalyst which may be toxic and / or expensive.
- the organomagnesium is a compound capable of reacting with alkyne and borane in the absence of a transition metal such as palladium, nickel, rhodium or ruthenium.
- the process is carried out in the absence of a base.
- the method according to the invention advantageously makes it possible to dispense with the use in the medium of an additional base which can promote the formation of uncontrolled secondary products.
- the organomagnesium is a catalyst which on its own is capable of reacting the alkyne and the borane.
- the process according to the invention does not require the addition of a base such as triethylamine (Et 3 N), unlike reactions using a transition metal as catalyst.
- the process is carried out in the absence of solvent.
- the process according to the invention has the advantage of allowing the use of crude liquid reagents acting as a solvent. It eliminates the need for solvent use, which has economic and ecological advantages.
- the process is carried out in the presence of a solvent, in particular an aprotic solvent.
- a solvent in particular an aprotic solvent.
- the process according to the invention allows the use of a wide range of solvents. Indeed, it can be implemented with solvents usually used in industry. The solvent can thus be chosen for reasons of cost, toxicity or adaptation to possible other synthesis steps.
- the solvent is chosen from the group comprising methylterbutylether (MTBE), tetrahydrofuran (THF), N, N-Dimethylformamide (DMF), benzene, deuterated benzene (C 6 D 6 ), toluene, xylene, diethylether (Et 2 0) or a mixture of said solvents, preferably MTBE.
- MTBE methylterbutylether
- THF tetrahydrofuran
- DMF N, N-Dimethylformamide
- benzene deuterated benzene
- C 6 D 6 deuterated benzene
- Et 2 0 diethylether
- the invention relates to a process in which the organomagnesium agent is used in an amount ranging from 5 mol% to 15 mol%.
- the use of the organomagnesium agent in a substoichiometric amount, advantageously in a catalytic amount, makes it possible to avoid the formation of salts or of residual products. It thus makes it possible to promote the yield and the purity of the product.
- the process is carried out at room temperature, that is to say at temperatures of from 10 ° C to 40 ° C, in particular of the order of 20 ° C to 30 ° C.
- Room temperature that is to say at temperatures of from 10 ° C to 40 ° C, in particular of the order of 20 ° C to 30 ° C.
- Working at room temperature makes it possible to overcome the constraint of controlling the reaction temperature. In particular, it is not necessary to heat the reaction mixture or to maintain the reaction at a cryogenic temperature in order to carry out the process according to the invention.
- the process is carried out in less than an hour, preferably in less than 5 to 10 minutes.
- the process according to the invention has the effect of not requiring the maintenance of reaction conditions for more than an hour, favoring the industrialization of the process.
- the invention relates to a process in which the degree of conversion of the alkyne to alkynylaminoborane is greater than 80%, preferably greater than 97%.
- the yield of the process according to the invention is quantitative.
- conversion rate is understood to mean the level of terminal alkyne which has reacted during the process. This level can be determined by analyzing the final product obtained by 1 H NMR. The comparison of the signal of the propargyl proton, on which the deprotonation reaction is carried out, with that of the other protons of the alkyne serving as a reference, makes it possible to evaluate the quantity of alkyne which reacted during the process according to the invention.
- the alkynylaminoborane obtained according to the process of the invention does not require an additional purification step because the purity of the product obtained is greater than 90%, in particular greater than 91%, 92%, 93%, 94%, 95% , 96%, 97%, 98% or 99%.
- the term "purification step” means any step subsequent to the synthesis step making it possible to increase the purity of the alkynylaminoborane.
- a purification step mention may be made of liquid chromatography, high performance liquid chromatography, recrystallization or distillation.
- the object of the process is the preparation of an alkynylaminoborane of formula (I) corresponding to one of the following formulas:
- the process according to the invention is characterized by an evolution of hydrogen which can be quantified by known methods such as gas chromatography.
- reaction balance of the process according to the invention is as follows:
- the molar amount of hydrogen generated during the single synthesis step is n times greater than the molar amount of alkynylaminoborane.
- the process of the invention with DIPOB and R'MgX has the following reaction balance:
- a molar amount of hydrogen released was found to be identical to the molar amount of alkynylaminoborane produced during the process.
- reaction balance can be diagrammed as follows:
- the evolution of hydrogen gas is twice as high as the above process using aminoborane as the starting reagent.
- the molar amount of hydrogen and alkynylaminoborane can indicate the presence of a dehydrogenation of the amine-borane complex in parallel with a borylation reaction of the alkyne according to the method.
- reaction balance the reaction according to the process of the invention with DIPAB as amine-borane complex and R′MgX, presents the following reaction balance:
- the borylation reaction is carried out by deprotonation of the propargyl proton of the alkyne by H-MgBr to form an R-Co C-MgBr intermediate.
- This intermediary reacts with the agent borylant, DIPOB, to form the hydride of the corresponding acynylaminoborane of formula (A). The latter releases a proton to form the final product.
- the invention relates to alkynylaminoboranes, belonging to the family of alkynylboranes, which has an alkynyl function directly linked to the Boron atom which carries an amine function.
- the invention also relates to a compound of the following formula (I): in which R is: - an alkyl group of 1 to 18 carbon atoms, linear or branched, optionally carrying at least one substituent,
- alkenyl or alkynyl group of 2 to 18 carbon atoms linear or branched, optionally carrying at least one substituent
- - a cycloalkyl or cycloalkenyl group of 3 to 18 carbon atoms optionally carrying at least one substituent
- aryl group of 2 to 12 carbon atoms where the aryl is chosen from the group of aromatics or heteroaromatics, optionally carrying at least one substituent
- alkyl aryl group an alkyl aryl group, where the aryl is chosen from the group of aromatics or heteroaromatics, optionally carrying at least one substituent,
- halogen chosen from F, Cl, Br, and I
- R a , R , R c and R d which may be identical or different, represent H, Cl, alkyl, alkenyl, linear or branched alkynyl, cycloalkyl, cycloalkenyl, aryl, in particular phenyl, or aromatic or non-aromatic heterocyclic groups of 1 to 18 carbon atoms, optionally carrying at least one substituent, where said substituents are chosen from:
- - halogens F, Cl, Br and I - OH n is an integer from 1 to 3
- R 1 and R 2 are identical or different groups, chosen from: alkyl groups of 1 to 18 carbon atoms, linear, branched or cyclic, optionally substituted by one or more identical or different OR 3 groups, in which R 3 is a alkyl group of 1 to 18 carbon atoms, linear, branched or cyclic, arylalkyl groups, optionally substituted by one or more identical or different OR 3 groups, in which R 3 is an alkyl group of 1 to 18 carbon atoms, linear , branched or cyclic, the two groups R and R 2 possibly being linked to together form a ring, in which R and R 2 are chosen to allow steric hindrance with respect to the amine function equivalent to that of diisopropylaminoborane (DIPOB) of formula BH 2 - N (iPr) 2 ,
- DIPOB diisopropylaminoborane
- the invention relates to a compound of formula (I), in which n is equal to 1 and has the following formula (1-1):
- R is a silyl group -SiR a R b R c, in particular R a , R b and R c, which are identical or different, are chosen from H, Cl atoms, alkyl groups with 1 to 18 carbon atoms or phenyls,
- Ri and R 2 are identical, and have the following formula (1-1-1):
- the invention relates to a compound of formula (I) corresponding to one of the following formulas:
- Another subject of the invention relates to the use of an aminoborane of formula BH 2 -I ⁇ ⁇ 2 for the implementation of a process for preparing an alkynylaminoborane according to the invention.
- the invention relates to the use of an aminoborane of formula BH 2 -I ⁇ ⁇ 2 for the implementation of a process for preparing an alkynylaminoborane derivative of following formula (I): where n, R, Ri and R 2 have the meanings indicated above, from a compound of the following formula: in the presence of an organomagnesium agent, optionally a solvent, in a single synthesis step.
- the invention relates to the use of DIPOB for the implementation of a process for preparing a compound of formula (II): where n and R have the meanings indicated above, from a compound of the following formula: in the presence of an organomagnesium agent, optionally a solvent, in a single synthesis step.
- the invention relates to the use of an amine-borane complex of formula BH 3 ⁇ - NIHR ⁇ for the implementation of a process for preparing an alkynylaminoborane according to the invention.
- Another object of the invention is the use of an organomagnesium agent, preferably a Grignard reagent of formula R'-MgX where R 'and X have the meanings indicated above, for the implementation of a process for preparing an alkynylaminoborane according to the invention.
- an organomagnesium agent preferably a Grignard reagent of formula R'-MgX where R 'and X have the meanings indicated above
- the invention relates to the use of an organomagnesium agent in a substoichiometric amount, preferably from 5 to 15 mol%, for the implementation of a process for preparing an alkynylaminoborane according to the invention.
- Another subject of the present invention relates to the use of the compounds of formula (I) according to the invention as reaction intermediates.
- Another object of the present invention is the use of the compounds of formula (I) according to the invention for multistage or coupling syntheses, preferably for the reactions of Suzuki, Chan-Lam-Evans and Petasis.
- the final product is obtained after filtration of the solution through Celite and evaporation of the solvent. Product performance is evaluated.
- the conversion relates to the disappearance of the alkyne.
- the conversion rate is determined using the 1 H NMR signals by comparison between the signals of the protons of the alkyne not involved during the reaction which serve as a reference and the signal of the propargyl proton.
- a total conversion of 100% corresponds to the total disappearance of the quantity of starting alkyne introduced, indicating that all the alkynes have been transformed during the process.
- Example 2 Variation of organomagnesium (nature and quantity) Alkynylaminoborane 2a is obtained from alkyne 1a and diisopropylaminoborane (DIPOB) of formula BH 2 -N (iPr) 2 in methylterbutylether (MTBE) in the presence of an organomagnesium agent (R'-MgX) according to the general protocol described in Example 1, according to the following reaction scheme: Tests were carried out to determine the influence of the nature of the organomagnesium and the quantity of organomagnesium introduced (in mol% relative to the alkyne) on the rate of conversion of alkyne 1a to alkynylaminoborane 2a .
- DIPOB diisopropylaminoborane
- MTBE methylterbutylether
- the conversion rate is evaluated by 1 H and 11 B NMR on the final product obtained. The results have been reported in Table 1. A conversion rate of 100% is obtained for the Grignard reagents in an amount of 5 mol%. When the organomagnesium rate decreases from 5% to 1%, the conversion rate decreases to 87%, and therefore remains above 80%.
- alkynylaminoborane 2a is obtained from alkyne 1a and DIPAB in the presence of 5 mol% PhMgBr in various solvents according to the protocol described in Example 1 according to the following reaction scheme:
- Tests were carried out in order to determine the influence of the nature of the solvent on the rate of conversion of alkyne 1a to alkynylaminoborane 2a.
- a test 9 with the crude reagents was carried out without solvent.
- the conversion rate is evaluated by 1 H and 11 B NMR on the final product obtained. The results have been reported in Table 2.
- reaction in toluene shows a conversion rate of 73%.
- a conversion rate of 100% is obtained with the other tested solvents MTBE, THF, C 6 D 6 , Et 2 0 as well as with the crude reagents. It should be noted that the test with the crude reagents allows, without solvent, a total conversion of the terminal alkyne into alkynylaminoborane.
- Different alkynylaminoboranes 2 are obtained from terminal alkyne 1 and diisopropylamine borane (DIPAB) in the presence of 5 mol% PhMgBr in MTBE according to the protocol described in Example 1 according to the following scheme:
- Tests were carried out with several R groups including alkyl groups (2a, 2b, 2c, 2I), cyclic groups (2f, 2h), aryl or alkylaryl groups (2d, 2e, 2m), alkylaromatic groups (2n , 2o), silyl groups (2g), amine groups (2k), groups substituted by halides (2i, 2j).
- the conversion rate is evaluated by 1 H and 11 B NMR. The results of the conversion rate and the yield after purification of the final products are shown in Table 3.
- a conversion rate of 100% is obtained for all the compounds, allowing a quantitative yield of the final products obtained, ranging from 83% to 98%.
- Compound 2h has a lower boiling point than MTBE.
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1911000A FR3101632B1 (fr) | 2019-10-04 | 2019-10-04 | Nouveaux alcynylaminoboranes, leur méthode de préparation et leurs utilisations |
| PCT/EP2020/077709 WO2021064199A1 (fr) | 2019-10-04 | 2020-10-02 | Nouveaux alcynylaminoboranes, leur methode de preparation et leurs utilisations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4038074A1 true EP4038074A1 (fr) | 2022-08-10 |
Family
ID=69190945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20780756.1A Withdrawn EP4038074A1 (fr) | 2019-10-04 | 2020-10-02 | Nouveaux alcynylaminoboranes, leur methode de preparation et leurs utilisations |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20220259230A1 (fr) |
| EP (1) | EP4038074A1 (fr) |
| FR (1) | FR3101632B1 (fr) |
| WO (1) | WO2021064199A1 (fr) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2833957B1 (fr) | 2001-12-21 | 2004-02-13 | Centre Nat Rech Scient | Composes(aryl)(amino)boranes, procede pour leur preparation |
| US8557980B2 (en) | 2010-02-18 | 2013-10-15 | The Board Of Trustees Of The University Of Illinois | Methods for forming protected organoboronic acids |
-
2019
- 2019-10-04 FR FR1911000A patent/FR3101632B1/fr active Active
-
2020
- 2020-10-02 EP EP20780756.1A patent/EP4038074A1/fr not_active Withdrawn
- 2020-10-02 US US17/765,553 patent/US20220259230A1/en not_active Abandoned
- 2020-10-02 WO PCT/EP2020/077709 patent/WO2021064199A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021064199A1 (fr) | 2021-04-08 |
| FR3101632B1 (fr) | 2022-07-22 |
| FR3101632A1 (fr) | 2021-04-09 |
| US20220259230A1 (en) | 2022-08-18 |
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