Pd-Catalyzed asymmetric transformations involving P*-mono- and P*,N-bidentate diamidophosphites derived from (2S,3S)-N 2,3-dimethyl-N 1-phenylpentane-1,2-diamine
作者:K. N. Gavrilov、I. V. Chuchelkin、S. V. Zheglov、A. A. Shiryaev、O. V. Potapova、I. M. Novikov、E. A. Rastorguev、P. V. Petrovskii、V. A. Davankov
DOI:10.1007/s11172-012-0267-3
日期:2012.10
The synthesis of new P*-mono- and P*,N-bidentate diamidophosphites, containing 1,3,2-diazaphospholidine rings formed starting from (2S,3S)-N 2,3-dimethyl-N 1-phenylpentane-1,2-diamine, is described. Comparison of their efficiency in the Pd-catalyzed enantioselective allylation with (E)-1,3-diphenylallyl acetate showed that up to 97% ee was reached in the reaction involving dimethyl malonate as a C-nucleophile. The Pd-catalyzed desymmetrization of N,N′-ditosyl-meso-cyclopent-4-ene-1,3-diol biscarbamate gave up to 61% ee.
描述了一种新型P*-单齿和P*,N-双齿二酰胺磷酸酯的合成,这些化合物包含从(2S,3S)-N 2,3-二甲基-N 1-苯基戊二胺出发形成的1,3,2-二氮基磷烯环。与(E)-1,3-二苯基丙烯酸乙酯的Pd催化选择性烯丙基化反应比较表明,在涉及二甲基美克酮作为C-亲核试剂的反应中,产物的对映体过量(ee)高达97%。Pd催化的N,N′-二托磺酰-美索-环戊-4-烯-1,3-二醇双氨基甲酸酯的去对称化反应得到的对映体过量最高可达61%。