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
Mesoionic carbenes: Reactions of 1,3-diphenyltetrazol-5-ylidene with electron-deficient alkenes, and synthesis and catalytic activities of the (tetrazol-5-ylidene)rhodium(I) complexes
N-phenylmaleimide, and dimethylacetylenedicarboxylate, did not give any coupling products, but gave phenylated products and/or Michael additionproducts via the degradation of the 1,3-diphenyltetrazole ring. Novel mesoionic mono- and bis(carbene)-rhodium(I) complexes were synthesized and the structures were characterized by X-ray crystallography. Their catalytic activities for the decarbonylative addition reaction
CUCN-MEDIATED ONE POT PRODUCTION OF CINNAMONITRILE DERIVATIVES
申请人:Council of Scientific & Industrial Research
公开号:US20150031899A1
公开(公告)日:2015-01-29
The present invention discloses a cheaper and practical protocol for the construction of a wide variety of o-cyanocin-namonitrile and their structural analogues that proceeds with good yields in a single step using CuCN as the only reagent.
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
QuadrupleFunctionalization: A one-pot regioselective [3+2] cycloaddition platform of fluorinatednitrileimines with dicyanoalkenes was established to produce a broad variety of fully substituted N1-aryl 3-di/trifluoromethyl-4/5-cyanopyrazole pharmacophores.