Réactivité d'organozinciques α-insaturés vis à vis de N-(phénylsulfanyl) iminoesters application à la synthèse d' α-aminoacides insaturés, mono- ou disubstitués
摘要:
A new general synthesis of C-subtituted alpha-aminoacids is described, using at first the regioselective reaction between alpha-unsaturated organozincs and N-(phenylsulfanyl)iminoesters.
[EN] INHIBITORS OF HISTONE DEACETYLASE USEFUL FOR THE TREATMENT OR PREVENTION OF HIV INFECTION<br/>[FR] INHIBITEURS D'HISTONE DÉSACÉTYLASE UTILES POUR LE TRAITEMENT OU LA PRÉVENTION D'UNE INFECTION PAR LE VIH
申请人:MERCK SHARP & DOHME
公开号:WO2020028150A1
公开(公告)日:2020-02-06
The present invention relates to Compounds of Formula (I): Formula (I) and pharmaceutically acceptable salts or prodrug thereof, wherein R1, R2, R3, Ra, Rb, A and B are as defined herein. The present invention also relates to compositions comprising at least one compound of Formula (I), and methods of using the compounds of Formula (I) for treating or preventing HIV infection in a subject.
[EN] METATHESIS REACTION INVOLVING THE UNSATURATED SIDE CHAIN OF AN ALPHA, ALPHA-DISUBSTITUTED AMINO ACID<br/>[FR] REACTION DE METATHESE FAISANT APPEL A LA CHAINE LATERALE INSATUREE D'UN ACIDE AMINE ALPHA, ALPHA-DISUBSTITUE
申请人:DSM IP ASSETS BV
公开号:WO2004101476A1
公开(公告)日:2004-11-25
The invention relates to a process for amino acid synthesis, i.e., the preparation of side chain unsaturated α,α-disubstituted-α-amino acid derivatives with formula (1) wherein: * denotes a stereogenic C-atom PG represents an N-protecting group or the C-terminal part of an optionally protected amino acid or peptide chain; X represents an optionally substituted amine group or an alkoxy group; R1 represents an optionally substituted alkyl group; Ri represents R2 or R3; if Ri = R2 then Rii = R5 and if Ri = R3 then Rii = H; R2, R3 and R5 each independently represent H, an optionally substituted (cyclo)alkyl, (hetero)aryl, acyl, alkoxycarbonyl, cyano, di-alkylphosphonyl, oxiranyl group, a CHO group optionally protected as its acetal, or a group derived from an O-protected carbohydrate, or R2 and R5 may form together with the C-atorn to which they are attached an optionally substituted hydrocarbon ring, with the proviso that R2 , R3 and R5 do not all represent H at the same time. R4 represents H, an alkyl group or an aryl group; n represents an integer larger than or equal to 0, via a cross metathesis reaction between the corresponding amino acid derivative precursor and an (eventually substituted) alkene.
METHOD FOR SYNTHESIZING OPTICALLY ACTIVE a-AMINO ACID USING CHIRAL METAL COMPLEX COMPRISING AXIALLY CHIRAL N-(2-ACYLARYL)-2-[5,7-DIHYDRO-6H-DIBENZO[c,e]AZEPIN-6-YL] ACETAMIDE COMPOUND AND AMINO ACID
申请人:HAMARI CHEMICALS, LTD.
公开号:US20160102045A1
公开(公告)日:2016-04-14
Objects of the present invention are to provide an industrially applicable method for producing an optically active α-amino acid in high yield and in a highly enantioselective manner, to provide a simple production method of an optically active α,α-disubstituted α-amino acid, and to provide an intermediate useful for the above production methods of an optically active α-amino acid and an optically active α,α-disubstituted α-amino acid.
The present invention provides a production method of an optically active α-amino acid or a salt thereof, the production method comprising introducing a substituent into the α carbon in the α-amino acid moiety of a metal complex represented by the following Formula (1):
by an alkylation reaction, an aldol reaction, the Michael reaction, or the Mannich reaction, and releasing an optically pure α-amino acid enantiomer or a salt thereof by acid decomposition of the metal complex.
A short, mild and efficient synthetic route of α-amino acid via alkylation, Michael addition and carbonyl addition as well as cycloaddition of aldimines derived from glycine and alanine esters with benzaldehyde under solid-liquid phase transfer catalytic condition has been studied. The key to solid-liquid phase transfer catalyzed reactions is the selection of a base for the various reactants. The yield
研究了在固-液相转移催化条件下,通过烷基化,迈克尔加成和羰基加成以及甘氨酸和丙氨酸酯衍生的亚胺与苯甲醛环加成,合成短而温和高效的α-氨基酸的路线。固液相转移催化反应的关键是为各种反应物选择碱。产量取决于所用的碱。讨论了使用KOH,K 2 CO 3和Na 2 CO 3获得的结果。研究了固液PTC苄基化反应的动力学,我们提出了一种可能的固液PTC机理作为界面自动催化程序。介绍了一些α-氨基酸合成的细节。
Biocide compositions comprising alkoxylation products of isoamyl alcohol derivatives
申请人:Cognis IP Management GmbH
公开号:EP2457890A1
公开(公告)日:2012-05-30
Suggested are alkoxylation products of 2-isopropyl-5-methyl-hexan-1-ol
in which AO stands for an ethylene oxide, propylene oxide or butylenes oxide unit or their mixtures and n denominates an integer of from 1 to 100.