Zn-Catalyzed Asymmetric Allylation for the Synthesis of Optically Active Allylglycine Derivatives. Regio- and Stereoselective Formal α-Addition of Allylboronates to Hydrazono Esters
have developed Zn-catalyzed asymmetricallylation of hydrazonoesters with allylboronates. The reactions proceeded smoothly in high yields and high stereoselectivities. Remarkably, formal α-addition occurred for α-substituted allylboronates exclusively, and excellent stereoselectivities were observed. This is the first example of catalytic regio- and stereoselective allylations with formal α-addition.
Enantioselective synthesis of (−)-α-conhydrine via cyclic sulfate methodology
作者:SubbaRao V. Kandula、Pradeep Kumar
DOI:10.1016/s0040-4039(03)00031-5
日期:2003.2
An asymmetric synthesis of (−)-α-conhydrine is described using the Sharpless asymmetric dihydroxylation and the regiospecific nucleophilic opening of a cyclic sulfate as the key steps.
AZETIDINE-SUBSTITUTED QUINOXALINE-TYPE PIPERIDINE COMPOUNDS AND USES THEREOF
申请人:Purdue Pharma L.P.
公开号:US20150011529A1
公开(公告)日:2015-01-08
The disclosure relates to Azetidine-Substituted Quinoxaline-Type Piperidine Compounds of Formula (I):
and pharmaceutically acceptable derivatives thereof wherein the R
1
, R
2
, R
3
, Q, Y
1
, Z, A, B, a, and b are as defined herein, compositions comprising an effective amount of an Azetidine-Substituted Quinoxaline-Type Piperidine Compound, and methods to treat or prevent a condition, such as pain, comprising administering to an animal in need thereof an effective amount of an Azetidine-Substituted Quinoxaline-Type Piperidine Compound.
US9290488B2
申请人:——
公开号:US9290488B2
公开(公告)日:2016-03-22
Asymmetric synthesis of (−)-α-conhydrine
作者:Subba Rao V. Kandula、Pradeep Kumar
DOI:10.1016/j.tetasy.2005.08.045
日期:2005.10
The enantioselectivesynthesis of (−)-α-conhydrine has been achieved by two different synthetic routes. The key steps include Sharpless asymmetric dihydroxylation, regioselective opening of a cyclic sulfate and Wittig olefination.