Catalytic 1,2-Dicyanation of Alkynes by Palladium(II) under Aerobic Conditions
作者:Shigeru Arai、Takashi Sato、Atsushi Nishida
DOI:10.1002/adsc.200900334
日期:2009.8
various alkynes in the presence of trimethylsilyl cyanide (TMSCN) by palladium(II) catalysis under aerobicconditions is investigated. This reaction includes two cyanation pathways, syn- and anti-cyanopalladation to alkynes that are activated by Pd(II). High syn-selectivity was observed in the reaction using terminal alkynes that have bulky substituents at a propargyl position and aliphatic internal
Stereoselective One-Pot Synthesis of <i>cis</i>
-1,2-Dicyanoalkenes from 1,1-Bis(benzenesulfonyl)alkenes and KCN
作者:Yue Zhang、Yi Wei、Shen Li、Jun-An Ma
DOI:10.1002/ejoc.201801504
日期:2019.1.10
cis‐1,2‐Dicyanoalkenes can be synthesized in good to high yields by a transition‐metal‐free one‐pot reaction of 1,1‐bis(benzenesulfonyl)alkenes with KCN under phase‐transfer conditions.
Rh-Catalyzed Asymmetric Hydrogenation of 1,2-Dicyanoalkenes
作者:Meina Li、Duanyang Kong、Guofu Zi、Guohua Hou
DOI:10.1021/acs.joc.6b02678
日期:2017.1.6
efficient enantioselectivehydrogenation of 1,2-dicyanoalkenes catalyzed by the complex of rhodium and f-spiroPhos has been developed. A series of 1,2-dicyanoalkenes were successfully hydrogenated to the corresponding chiral 1,2-dicyanoalkanes under mild conditions with excellent enantioselectivities (up to 98% ee). This methodology provides efficient access to the asymmetric synthesis of chiral diamines