将三溴化磷或亚硫酰氯添加到R 3 SiCH 2 CD 2 OH类型的化合物(其中R 3 = Me 3,PhMe 2,Ph 2 Me或Ph 3)中,得到的氘代α的比例大致相同乘积R 3 SICH 2 CD 2 X和β-氘代乘积R 3 SICD 2 CH 2 X在所有情况下。碎片伴随重排,分解产物的收率R 3SiX随硅上的连续苯基取代而降低,并且用(2-羟乙基-2,2- d 2)三苯基硅烷Ph 3 SiCH 2 CD 2 OH几乎没有观察到分解。
Facile Synthesis of Phthalides from Methyl <i>ortho</i>-Iodobenzoates and Ketones via an Iodine–Magnesium Exchange Reaction Using a Silylmethyl Grignard Reagent
作者:Yu Nakamura、Suguru Yoshida、Takamitsu Hosoya
DOI:10.1246/cl.170211
日期:2017.6.5
Phthalides have been easily prepared by the treatment of methyl o-iodobenzoates with a silylmethyl Grignard reagent in the presence of ketones. The electron-withdrawing ester moiety of methyl o-iodobenzoates and the low nucleophilicity of the silylmethyl Grignard reagent prompted a smooth iodine–magnesium exchange reaction, at room temperature, without affecting the ester moiety or resulting in an