手性C 2 -对称 3,3'-二氨基甲基-联萘酚 ( AMB ) 是一种用于三取代丙烯腈不对称环氧化的有机催化剂。使用氢过氧化枯烯 (CHP) 作为氧化剂,3,3'-双(( R , R )-2-苯乙基氨基甲基)-( R )-联萘酚( AMB2 )在 - 30 °C 得到手性环氧化物作为单一非对映异构体,对映选择性范围为 15% ee 至 97% ee。
Organocatalytic asymmetric synthesis of highly substituted pyrrolidines bearing a stereogenic quaternary centre at the 3-position
作者:Soumendranath Mukhopadhyay、Subhas Chandra Pan
DOI:10.1039/c8ob02648c
日期:——
An organocatalyticasymmetric cascade reaction has been developed for the synthesis of highlysubstituted pyrrolidines having a stereogenic quaternary centre at the 3-position. N-Tosyl aminomethyl enone and trans-α-cyano-α,β-unsaturated ketone were utilized as the reaction partners in this method. Cinchonidine derived bifunctional amino-squaramide catalysts were the best to obtain the products in high
Phosphine-catalyzed [3 + 2] annulation of β-sulfonamido-substituted enones with <i>trans</i>-α-cyano-α,β-unsaturated ketones for the synthesis of highly substituted pyrrolidines
To synthesize highly substituted pyrrolidines, we developed a phosphine-catalyzed [3 + 2] annulation of β-sulfonamido-substituted enones with trans-α-cyano-α,β-unsaturated ketones. We prepared a series of pyrrolidines under mild conditions with high yields and moderate-to-good diastereoselectivities. A catalytic mechanism for this reaction is suggested.
Chiral Aminomethylbinaphthol‐Catalyzed Diastereo‐ and Enantioselective Epoxidation of Trisubstituted Acrylonitriles
作者:Eri Ogino、Satoru Kuwano、Takayoshi Arai
DOI:10.1002/adsc.202200036
日期:2022.4.12
3′-bisaminomethyl-binaphthol (AMB) is an organocatalyst for the asymmetric epoxidation of trisubstituted acrylonitriles. Using cumene hydroperoxide (CHP) as an oxidant, 3,3′-bis((R,R)-2-phenylethylaminomethyl)-(R)-binaphthol (AMB2) catalyzed epoxidation of trans-2-aroyl-3-arylacrylonitriles at −30 °C to give the chiral epoxides as a single diastereomer with enantioselective manner ranging from 15% ee to 97%
手性C 2 -对称 3,3'-二氨基甲基-联萘酚 ( AMB ) 是一种用于三取代丙烯腈不对称环氧化的有机催化剂。使用氢过氧化枯烯 (CHP) 作为氧化剂,3,3'-双(( R , R )-2-苯乙基氨基甲基)-( R )-联萘酚( AMB2 )在 - 30 °C 得到手性环氧化物作为单一非对映异构体,对映选择性范围为 15% ee 至 97% ee。