Stereoselective Olefin Ring‐Opening Cross Metathesis Catalyzed by Molybdenum Imido Alkylidene
<i>N</i>
‐Heterocyclic Carbene Complexes
作者:Mohasin Momin、Gergely M. Nagy、Michael R. Buchmeiser
DOI:10.1002/adsc.201900979
日期:2019.12.17
i. e. of [Mo(N‐2‐tert‐butyl‐C6H4) (CHCMe2Ph)(NHC)X+ B(ArF)4−] (NHC=1,3‐di(2‐Pr)imidazol‐2‐ylidene (iPr), 1,3‐dimesitylimidazol‐2‐ylidene (IMes); X=pyrrolide, OCH(CF3)2, B(ArF)4−=tetrakis(3,5‐bis(trifluoromethyl)phenyl)borate) and of [Mo(N‐3,5‐Me2‐C6H3)(CHCMe2Ph)(NHC)(CH3CN)X+ B(ArF)4−] (NHC=1,3‐dimesitylimidazol‐2‐ylidene, 1,3‐dimesitylimidazolin‐2‐ylidene (IMesH2); X=CF3SO3, OCPh(CF3)2) on E/Z‐selectivity
阳离子钼亚胺基亚烷基N杂环卡宾(NHC)催化剂的结构影响,i。e。的[沫(N-2-叔丁基-C 6 H ^ 4)(CHCMe 2 PH)(NHC)X + B(氩˚F)4 - ](NHC = 1,3-二(2-PR)咪唑咪唑-2-亚基(我PR),1,3- dimesitylimidazol -2-亚基(IMES); X =吡咯,OCH(CF 3)2,B(AR ˚F)4 - =四(3,5-双(三氟甲基) )和([Mo(N-3,5-Me 2 -C 6 H 3)(CHCMe 2Ph)(NHC)(CH 3 CN)X + B(Ar F)4 − ](NHC = 1,3-二甲酰亚胺基-2-亚基,1,3-二咪唑啉-2-基(IMesH 2); X = CF 3 SO 3,OCPh(CF 3)2)对内,内-2,3-二苯甲氧基降冰片烯5-内烯(内,内-DCMNBE)的开环交叉复分解(ROCM)的E / Z选择性,exo,exo