Intramolecular S<sub>N</sub>′-Type Aromatic Substitution of Benzylic Carbonates at their Para-Position
作者:Satoshi Ueno、Sadakazu Komiya、Takeshi Tanaka、Ryoichi Kuwano
DOI:10.1021/ol203089k
日期:2012.1.6
es. In the catalytic cyclization, the internal nucleophile attacks not the ortho-carbon but the para-carbon of the benzylic ester. The [3 + 2] cycloaddition of m-(silylmethyl)benzyl carbonates with alkylidene malonates was developed from the palladium-catalyzed intramolecular SN′-type aromatic substitution.
苄基碳酸酯,其通过活性次连接一个ö亚苯基系链在它们的间位,通过将Pd(η环化3 -C 3 H ^ 5)的Cp-S-PHOS催化剂,得到3-甲基-9,10- -二氢菲。在催化环化中,内部亲核试剂不是攻击苄酯的邻碳,而是攻击对碳。的[3 + 2]环加成米- (甲硅烷基甲基)苄基碳酸酯与亚烷基丙二酸酯从钯催化的分子内S为开发Ñ '型芳族取代。