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.
Construction of Pyridazine Analogues <i>via</i>
Rhodium-mediated C-H Activation
作者:Chao Yang、Feifei Song、Jiean Chen、Yong Huang
DOI:10.1002/adsc.201700905
日期:2017.10.25
Herein a rhodium (III)‐mediated catalysis was demonstrated for approaching the structurally divergent N,N‐bicyclic pyridazine analogues. The pyrazolidinone moiety was used to direct the ortho C−H activation and this led to a general synthesis of benzopyridazine analogues with satisfactory yields. The crucial effect of the base was illustrated in the sequential dehydration process. For mechanistic insight
One-Pot Protocol for Synthesis of<font>α</font>-Organosulfonyloxy Ketones from Secondary Alcohols Using Hypervalent Iodine(V)–Mediated Oxidations
作者:Swapnil S. Deshmukh、Sameerana N. Huddar、Krishnacharya G. Akamanchi
DOI:10.1080/00397910902730952
日期:2009.7.29
Abstract α-Tosyloxy ketones and α-mesyloxy ketones were directly prepared from alcohols in one pot by treatment with hypervalentiodine(V) reagents in combination with p-toluenesulfonic acid and methanesulfonic acid, respectively, in moderate to good yields. Reactions were also feasible under solvent-free conditions.
Reaction of [hydroxy(tosyloxy)iodo]benzene and [hydroxy(mesyloxy)iodo]benzene with trimethylsilyl enol ethers. A new general method for .alpha.-sulfonyloxylation of carbonyl compounds
作者:Robert M. Moriarty、Raju Penmasta、Alok K. Awasthi、W. Ruwan Epa、Indra Prakash
DOI:10.1021/jo00266a020
日期:1989.3
MORIARTY, ROBERT M.;PENMASTA, RAJU;AWASTHI, ALOK K.;EPA, W. RUWAN;PRAKASH+, J. ORG. CHEM., 54,(1989) N, C. 1101-1104
作者:MORIARTY, ROBERT M.、PENMASTA, RAJU、AWASTHI, ALOK K.、EPA, W. RUWAN、PRAKASH+
DOI:——
日期:——
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.