Unusual conformational effects on the regioselectivity of olefin insertion in the rhodium-catalyzed hydroformylation of 4-methylene-1,3-dioxanes
摘要:
A mechanistic model for the rhodium-catalyzed hydroformylation of 4-methylene-1,3-dioxanes is described. As part of a study aimed at an anti-diastereoselective hydroformylation, unusual conformational effects on the regioselectivity of the reaction were discovered. This discovery has led to the proposal that the product mixtures are governed by classical Curtin-Hammett kinetics. (C) 1998 Elsevier Science Ltd. All rights reserved.
Unusual conformational effects on the regioselectivity of olefin insertion in the rhodium-catalyzed hydroformylation of 4-methylene-1,3-dioxanes
摘要:
A mechanistic model for the rhodium-catalyzed hydroformylation of 4-methylene-1,3-dioxanes is described. As part of a study aimed at an anti-diastereoselective hydroformylation, unusual conformational effects on the regioselectivity of the reaction were discovered. This discovery has led to the proposal that the product mixtures are governed by classical Curtin-Hammett kinetics. (C) 1998 Elsevier Science Ltd. All rights reserved.
Absolute Configurations of Melanoxadin, MR-93A, Melanoxazal, and MR-93B
作者:Tian-Jun He、Shijun Zhu、Xiao-Wei Lu、Yikang Wu、Yan Li
DOI:10.1002/ejoc.201403287
日期:2015.1
Fungal metabolites melanoxadin, MR-93A, melanoxazal, and MR-93B were synthesized with the key stereogenic centers derived from commercially available chiral building blocks. The optically active synthetic products with well-defined absoluteconfigurations provided authentic samples for the stereoisomers of these oxazole-containing natural products and thus allowed for unambiguous assignments of their
作者:Seebach, Dieter、Imwinkelried, Rene、Stucky, Gerhard
DOI:——
日期:——
Unusual conformational effects on the regioselectivity of olefin insertion in the rhodium-catalyzed hydroformylation of 4-methylene-1,3-dioxanes
作者:Stella T. Sarraf、James L. Leighton
DOI:10.1016/s0040-4039(98)01351-3
日期:1998.9
A mechanistic model for the rhodium-catalyzed hydroformylation of 4-methylene-1,3-dioxanes is described. As part of a study aimed at an anti-diastereoselective hydroformylation, unusual conformational effects on the regioselectivity of the reaction were discovered. This discovery has led to the proposal that the product mixtures are governed by classical Curtin-Hammett kinetics. (C) 1998 Elsevier Science Ltd. All rights reserved.