A new mode of cyclic carbamate formation via tert-butyldimethylsilyl carbamate. Stereoselective syntheses of statine and its analogue
作者:Masahiro Sakaitani、Yasufumi Ohfune
DOI:10.1016/s0040-4039(00)96439-6
日期:1987.1
Stereoselective construction of 1,2- and 1,3-amino hydroxyl systems was carried out using SN2′ (initiated by AgF or AgF-Pd(II)) cycliccarbamateformationsfrom tert-butyldimethyl silylcarbamates. This method was applied to the syntheses of statine and AHPPA, efficiently.
使用S N 2'(由AgF或AgF-Pd(II)引发)由叔丁基二甲基甲硅烷基氨基甲酸酯形成的环状氨基甲酸酯,进行1,2-和1,3-氨基羟基系统的立体选择性构建。该方法有效地应用于了他汀类药物和AHPPA的合成。
Pd-catalyzed ScN' reactions: Stereoselective formation of cyclic carbamates from tert-butyldimethylsilyl carbamates
作者:Glen W. Spears、Koji Nakanishi、Yasufumi Ohfune
DOI:10.1016/s0040-4039(00)98065-1
日期:1990.1
Stereoselective formation of cyclic carbamates was achieved by the intramolecular trapping of a tert-butyldimethylsilyloxycarbonyl group with allylic esters upon activation with fluoride and cat. Pd(O). The reactive conformation is proposed to be D. The highly stereo;elective reaction of 2° allylic esters allowed a detailed reaction mechanism to be proposed which accounts for the observed selectivities