A general palladium-catalyzedsynthesis of linear esters directly from sec- and tert-alcohols is described. Compared to the classic Koch–Haaf reaction, which leads to branched products, this new transformation gives the corresponding linear esters in high yields and selectivity. Key for this protocol is the use of an advanced palladium catalyst system with L2 (pytbpx) as the ligand. A variety of aliphatic
直接从直链酯的一般钯催化合成的仲-和叔-醇进行说明。与导致分支产物的经典科赫-哈夫反应相比,这种新的转化以高收率和选择性提供了相应的线性酯。该协议的关键是使用具有L2(py t bpx)作为配体的高级钯催化剂体系。可以直接使用多种脂族和苄醇,基准反应的催化剂效率非常出色(周转数高达89 000)。
CERTAIN CHEMICAL ENTITIES, COMPOSITIONS, AND METHODS
申请人:QIAN Xiangping
公开号:US20120135964A1
公开(公告)日:2012-05-31
Chemical entities that modulate smooth muscle myosin and/or non-muscle myosin, pharmaceutical compositions and methods of treatment of diseases and conditions associated with smooth muscle myosin and/or non-muscle myosin are described.
842. The elimination of carbon monoxide from acid derivatives. Part II. Friedel–Crafts reactions (i) with αα-dialkylglutaric anhydrides, (ii) involving cyclisation with elimination