Synthesis of optically active 2-hydroxy monoesters via-kinetic resolution and asymmetric cyclization catalyzed by heterometallic chiral (salen) Co complex
作者:Wenji Li、Santosh Singh Thakur、Shu-Wei Chen、Chang-Kyo Shin、Rahul B. Kawthekar、Geon-Joong Kim
DOI:10.1016/j.tetlet.2006.03.042
日期:2006.5
The binuclear chiral (salen) Co complexes bearing Lewis acids of Al and Ga catalyze regio- and enantioselective ring opening of terminal epoxides with carboxylic acids. The ring opened product of epichlorohydrin with carboxylic acids followed by cyclization step in the presence of catalyst and base represent straightforward, efficient methods for the synthesis of enatiomerically enriched (>99% ee)
PHYTOSANITARY FORMULATION GENERATING NANOPARTICLES, METHOD FOR PREPARING NANOPARTICLES AND USE THEREOF
申请人:Balastre Marc
公开号:US20110014255A1
公开(公告)日:2011-01-20
The present invention relates to a phytosanitary formulation capable of generating nanoparticles. The formulation includes a solvent having a low water miscibility, an active ingredient and at least one amphiphilic compound. The formulation is concentrated and is intended to be diluted in water by a farmer. The present invention also relates to a method for preparing nanoparticles of a phytosanitary active ingredient using the formulation of the invention.
Heteroatom-Directed Acylation of Secondary Alcohols To Assign Absolute Configuration
作者:Alexander S. Burns、Christopher C. Ross、Scott D. Rychnovsky
DOI:10.1021/acs.joc.7b03156
日期:2018.3.2
is effective for the enantioselectiveacylation and kineticresolution of benzylic secondaryalcohols. The enantioselectiveacylation has now been extended to secondaryalcohols bearing electron-withdrawing groups such as halides and other heteroatoms. The level of selectivity is modest to good and is sufficient for determining configuration using the competing enantioselective conversion method. A