Asymmetric Radical Reaction in the Coordination Sphere. IV. Ruthenium(II)-Catalyzed Asymmetric Addition of Sulfonyl Chloride to 1-Phenylpropene
作者:Masayuki Kameyama、Nobumasa Kamigata
DOI:10.1246/bcsj.62.648
日期:1989.2
The asymmetric addition of methane- and p-toluenesulfonyl chloride to 1-phenylpropene catalyzed by Ru2Cl4[(−)-diop]3 affords optically active 1:1 adducts, (+)-(1R,2RS)-1-chloro-2-methylsulfonyl-1-phenylpropane (2) and (+)-(1R,2RS)-1-chloro-1-phenyl-2-tosylpropane (3), with about 13–19%ee. Similarly, (−)-(1S,2RS)-2 and (−)-(1S,2RS)-3 were obtained when Ru2Cl4[(+)-diop]3 was employed. A enantiolace differentiation
在 Ru2Cl4[(-)-diop]3 催化下,甲烷和对甲苯磺酰氯与 1-苯基丙烯的不对称加成得到光学活性 1:1 的加合物,(+)-(1R,2RS)-1-chloro-2-甲基磺酰基-1-苯基丙烷 (2) 和 (+)-(1R,2RS)-1-chloro-1-phenyl-2-tosylpropane (3),约 13–19%ee。类似地,当使用 Ru2Cl4[(+)-diop]3 时,得到 (-)-(1S,2RS)-2 和 (-)-(1S,2RS)-3。对映体分化被认为发生在从钌 (III) 物种到配位球中的碳自由基的氯原子转移步骤中。