[EN] BIS-QUARTERNARY CINCHONA ALKALOID SALTS AS ASYMMETRIC PHASE TRANSFER CATALYSTS<br/>[FR] SELS ALCALOÏDES BIS-QUATERNAIRES DE QUINQUINA À TITRE DE CATALYSEURS PAR TRANSFERT DE PHASE ASYMÉTRIQUE
申请人:MERCK SHARP & DOHME
公开号:WO2013138413A1
公开(公告)日:2013-09-19
The invention is directed to novel bis-quarternary cinchona alkaloid salts and the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis. The present invention is directed to novel bis-quarternary cinchona alkaloid salts and the use of bis-quartenary cinchona alkaloid salts in asymmetric phase transfer catalysis. On certain substrates and under specific reaction conditions, the inventors have discovered that the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis surprisingly provides for a more active and efficient process as compared to mono-quarternary catalysts.
BIS-QUARTERNARY CINCHONA ALKALOID SALTS AS ASYMMETRIC PHASE TRANSFER CATALYSTS
申请人:Merck Sharp & Dohme Corp.
公开号:US20150031891A1
公开(公告)日:2015-01-29
The invention is directed to novel bis-quarternary cinchona alkaloid salts and the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis. The present invention is directed to novel bis-quarternary cinchona alkaloid salts and the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis. On certain substrates and under specific reaction conditions, the inventors have discovered that the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis surprisingly provides for a more active and efficient process as compared to mono-quarternary catalysts.
The invention relates to a process for stereoselectively producing a compound of Formula A
wherein Q, RA and RB and PG are as defined in the description and wherein the reaction takes place in the presence of a bis-quaternary cinchona alkaloid salt phase transfer catalyst.
本发明涉及一种立体选择性生产式 A 化合物的工艺
其中 Q、RA 和 RB 以及 PG 如描述中所定义,反应在双季金鸡纳生物碱盐相转移催化剂存在下进行。
Anionic-Anionic Asymmetric Tandem Reactions: One-Pot Synthesis of Optically Pure Fluorinated Indolines from 2-<i>p</i>-Tolylsulfinyl Alkylbenzenes
作者:José Luis García Ruano、José Alemán、Silvia Catalán、Vanesa Marcos、Silvia Monteagudo、Alejandro Parra、Carlos del Pozo、Santos Fustero
DOI:10.1002/anie.200802885
日期:2008.9.29
Glycopeptide Antibiotic Monomer Derivatives
申请人:Arimoto Hirokazu
公开号:US20080097078A1
公开(公告)日:2008-04-24
Novel glycopeptide antibiotic derivatives. These derivatives are represented by the formula (aglycon part of glycopeptide antibiotic derivative)-(Sac-NH)—R
A
[wherein (aglycon part of glycopeptide antibiotic derivative) is the part formed by removing the sugar part from a known glycopeptide antibiotic derivative; (Sac-NH) part is an amino sugar part or a sugar chain part containing an amino sugar; and R
A
represents, e.g., the formula —X
1
—Ar
1
—X
2
—Y—X
3
—Ar
2
(wherein X
1
, X
2
, and X
3
each represents 1) a single bond or 2) a heteroatom or heteroatom-containing group selected from the group consisting of —N═, ═N—, —NR
1
—, —O—, etc.; Y represents —NR
2
CO— or —CONR
2
— (wherein R
2
represents hydrogen or lower alkyl), etc.)]. These derivatives have antibacterial activity against vancomycin-resistant bacteria.