Enantioselective Rh-catalyzed transfer hydrogenation of α-sulfonyloxy heteroaryl ketones; asymmetric synthesis of (S)-bufuralol
摘要:
Asymmetric transfer hydrogenation of a-sulfonyloxy heteroaryl ketones mediated by Cp*RhCl[(S,S)-TsDPEN] using an azeotropic mixture of formic acid/triethylamine afforded the corresponding diol-2-monosulfonates in excellent yield with high enantioselectivity. This led to the asymmetric synthesis of (S)-bufuralol. (C) 2009 Elsevier Ltd. All rights reserved.
用RhCl [(R,R)-TsDPEN](C 5 Me 5)催化的甲酸/三乙胺共沸混合物将代表性的苯并呋喃基α-磺酰氧基酮和N-保护的α-氨基酮进行不对称转移氢化,得到了相应的1,2-二醇单磺酸盐和N-取代的β-氨基醇,收率高,对映选择性高达99%。还描述了还原产物向具有伯胺基的手性苯并呋喃基β-氨基醇的转化。
Enantioselective Rh-catalyzed transfer hydrogenation of α-sulfonyloxy heteroaryl ketones; asymmetric synthesis of (S)-bufuralol
作者:Se Hun Kwak、Do-Min Lee、Kee-In Lee
DOI:10.1016/j.tetasy.2009.11.002
日期:2009.11
Asymmetric transfer hydrogenation of a-sulfonyloxy heteroaryl ketones mediated by Cp*RhCl[(S,S)-TsDPEN] using an azeotropic mixture of formic acid/triethylamine afforded the corresponding diol-2-monosulfonates in excellent yield with high enantioselectivity. This led to the asymmetric synthesis of (S)-bufuralol. (C) 2009 Elsevier Ltd. All rights reserved.
Asymmetric synthesis of benzofuryl β-amino alcohols by the transfer hydrogenation of α-functionalized ketones
作者:Agnieszka Tafelska-Kaczmarek、Marek P. Krzemiński、Marta Ćwiklińska
DOI:10.1016/j.tet.2017.05.059
日期:2017.7
The asymmetrictransferhydrogenation of representative benzofuryl α-sulfonyloxy ketones and N-protected α-amino ketones with an azeotropic mixture of formic acid/triethylamine, catalyzed by RhCl[(R,R)-TsDPEN](C5Me5), afforded the corresponding 1,2-diol monosulfonates and N-substituted β-amino alcohols in high yields and with enantioselectivities up to 99%. Transformation of the reduction products
用RhCl [(R,R)-TsDPEN](C 5 Me 5)催化的甲酸/三乙胺共沸混合物将代表性的苯并呋喃基α-磺酰氧基酮和N-保护的α-氨基酮进行不对称转移氢化,得到了相应的1,2-二醇单磺酸盐和N-取代的β-氨基醇,收率高,对映选择性高达99%。还描述了还原产物向具有伯胺基的手性苯并呋喃基β-氨基醇的转化。