MgBr 2促进ArTi(O i Pr)3的对映体选择性芳基加成到N,N'-磺酰化(1 R,2 R)-环己烷-1,2-二胺†的钛(iv)催化剂上的酮中
摘要:
据报道,MgBr 2促进了N,N'-磺酰化(1 R,2 R)-环己烷-1,2-二胺的钛催化剂催化的酮类化合物向酮中不对称地添加ArTi(O i Pr)3,结果表明:具有吸电子基团的手性N,N'-磺酰化环己烷-1,2-二胺可以有效催化不对称地将ArTi(O i Pr)3加到酮上,以高收率提供所需的叔醇,并具有良好的对映选择性。到95%ee。
A catalytic enantioselective reaction using a C-symmetric disulfonamide as a chiral ligand: Simmons-Smith cyclopropanation of allylic alcohols by the Et2Zn-CH2I2-disulfonamide system
A catalytic and enantioselective Simmons-SmithCyclopropanation of an allylic alcohol was developed by the reaction of an allylic alcohol with Et2Zn and CH2I2 in the presence of a catalytic amount of chiral disulfonamide 4.
在催化量的手性二磺酰胺4的存在下,通过烯丙基醇与Et 2 Zn和CH 2 I 2的反应,开发了烯丙基醇的催化和对映选择性席梦思-史密斯环丙烷化反应。