Asymmetric Morita–Baylis–Hillman reaction catalyzed by pepsin
摘要:
Pepsin from porcine gastric mucous shown catalytic promiscuity was first discovered to catalyze the Morita-Baylis-Hillman (MBH) reaction between aromatic aldehydes with 2-cyclohexen-1-one or 2-cyclopenten-i-one in a two-phase medium of phosphate buffer/cyclohexane in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO). The best results of the corresponding MBH products up to 77% yield and 38% ee were achieved. (C) 2015 Elsevier B.V. All rights reserved.
A highly efficient kinetic resolution of Morita–Baylis–Hillman adducts achieved by N–Ar axially chiral Pd-complexes catalyzed asymmetric allylation
作者:Feijun Wang、Shengke Li、Mingliang Qu、Mei-Xin Zhao、Lian-Jun Liu、Min Shi
DOI:10.1039/c1cc15543a
日期:——
Palladium complexes with an axially chiral NâAr framework have been developed. These complexes showed high stereoselectivities in asymmetric allylic arylation to achieve the kinetic resolution of MoritaâBaylisâHillman adducts, affording up to 99% ee of (E)-allylation products and 92% ee of recovered MoritaâBaylisâHillman adducts.
Asymmetric Morita–Baylis–Hillman reactions of 2-cyclohexen-1-one catalyzed by chiral biaryl-based bis(thiourea) organocatalysts
作者:Yuki Nakayama、Takashi Gotanda、Katsuji Ito
DOI:10.1016/j.tetlet.2011.09.064
日期:2011.11
Newly-developed bis(thiourea) 1d was found to be an efficient organocatalyst for the Morita-Baylis-Hillman reaction. High enantioselectivities were obtained in the reaction of 2-cyclohexen-1-one with both aromatic aldehydes (up to 84% ee) and aliphatic aldehydes (up to 96% ee). (C) 2011 Elsevier Ltd. All rights reserved.
Asymmetric Morita-Baylis-Hillman Reaction of Arylaldehydes with 2-Cyclohexen-1-one Catalyzed by Chiral Bis(Thio)urea and DABCO
作者:Min Shi、Xu-Guang Liu
DOI:10.1021/ol7028806
日期:2008.3.1
Novel bis(thio)urea organocatalysts were synthesized from axially chiral (R)-(-)-5,5',6,6',7,7',8,8'-octahydro-1,1'-binaphthyl-2,2'-diamine (H-8-BINAM), and their catalytic abilities have been examined in the Morita-Baylis-Hillman reaction of 2-cyclohexen-1-one or 2-cyclopenten-1-one with a wide range of aromatic aldehydes in combination with DABCO. The best result was achieved in the reaction of 3-fluorobenzaldehyde with 2-cyclohexen-1-one to give the desired Morita-Baylis-Hillman product in 79% yield and 88% ee.
Asymmetric Morita–Baylis–Hillman reaction catalyzed by pepsin
Pepsin from porcine gastric mucous shown catalytic promiscuity was first discovered to catalyze the Morita-Baylis-Hillman (MBH) reaction between aromatic aldehydes with 2-cyclohexen-1-one or 2-cyclopenten-i-one in a two-phase medium of phosphate buffer/cyclohexane in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO). The best results of the corresponding MBH products up to 77% yield and 38% ee were achieved. (C) 2015 Elsevier B.V. All rights reserved.