Tandem Addition/Cyclization Reaction of Organozinc Reagents to 2-Alkynyl Aldehydes: Highly Efficient Regio- and Enantioselective Synthesis of 1,3-Dihydroisobenzofurans and Tetrasubstituted Furans
作者:Zhuo Chai、Zheng-Feng Xie、Xin-Yuan Liu、Gang Zhao、Ji-De Wang
DOI:10.1021/jo800029m
日期:2008.4.1
The enantioselective addition of organozinc reagents to some 2-alkynyl benzaldehydes and the subsequent regioselective cyclization step was performed in one pot to form chiral 1,3-dihydroisobenzofurans with good product yields and excellent regio- and enantioselectivities. In the case of 2-alkynylcycloalkene aldehydes, tetrasubstituted furans were obtained in good product yields through a 1, 5-hydride
在一个罐中对一些2-炔基苯甲醛进行对映选择性加成有机锌试剂,然后进行区域选择性环化步骤,以形成手性的1,3-二氢异苯并呋喃,具有良好的产物收率和优异的区域和对映选择性。在2-炔基环烯醛的情况下,通过预先形成的环化产物的1,5-氢化物转移,以良好的产物收率获得了四取代的呋喃。