Hetero Diels−Alder Reactions of 1-Amino-3-siloxy-1,3-butadienes under Strictly Thermal Conditions
作者:Yong Huang、Viresh H. Rawal
DOI:10.1021/ol006404d
日期:2000.10.1
The hetero Diels-Alderreaction of 1-amino-3-siloxy-1,3-butadiene (1a) with a range of unactivated aldehydes proceeds readily under remarkably mild conditions: at room temperature and in the absence of Lewis acid catalysts. The cycloadducts are formed in good yields and can be converted directly to the corresponding dihydro-4-pyrones using acetyl chloride. Ketones and imines are also reactive in hetero
[EN] CHEMOKING RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DES RÉCEPTEURS DE CHIMIOKINES
申请人:ABBOTT LAB
公开号:WO2013010453A1
公开(公告)日:2013-01-24
Disclosed herein are chemokine receptor antagonists of formula (I) wherein G1, X1, X2, and X3 are as defined in the specification. Compositions comprising such compounds; and methods for treating conditions and disorders using such compounds and compositions are also described.
proved to beefficient catalysts for promoting asymmetrichetero-Diels–Alderreactions with good activities and high enantioselectivities (up to 88 % ee). These complexes were successfully electropolymerized to give chiral polymers as insoluble powders for use in asymmetricheterogeneous catalysis. When engaged in successive hetero-Diels–Alderreactions, they afforded the expected products in high yield