New chiral diamide ligands: synthesis and application in allylic alkylation
摘要:
A new family of chiral diamide ligands has been designed and synthesised. These ligands have been successfully applied to an asymmetric allylic substitution reaction. A palladium complex of one of the diamide ligands achieved enantio selectivities of up to 93% in the allylic alkylation of 1,3-diphenyl-3-acetoxyprop-1-ene. (C) 2008 Elsevier Ltd. All rights reserved.
我们报告了我们在开发以 3-烷基羟吲哚作为亲核试剂的 Mo 催化的不对称烯丙基烷基化反应方面所做的工作。就羟吲哚亲核试剂的范围而言,该反应与 Pd 催化反应互补。许多3-烷基羟吲哚在温和条件下成功烷基化,得到具有优异收率和良好对映选择性的产品。据报道,该方法应用于制备二氢吲哚生物碱,如 (-)-毒扁豆碱、ent- (-)-去溴氟曲明 B 和 communesin B 的吲哚啉喹啉环。
The synthesis of enantiomerically pure C 2-symmetric bis-pyridinium salts was realized through a simple condensation of 2-pyridyl-carboxyaldehydes with a chiral diamine. The catalytic properties of such novel compounds were preliminarily studied and the trifluoracetate salts of chiral bis-imines of 2-picolinaldehydes derivedfrom1,1′-binaphthyl-2,2′-diamine were shown to catalyze the Diels-Alder reaction
New chiral diamide ligands: synthesis and application in allylic alkylation
作者:Lorraine Bateman、Simon W. Breeden、Patrick O’Leary
DOI:10.1016/j.tetasy.2008.01.018
日期:2008.2
A new family of chiral diamide ligands has been designed and synthesised. These ligands have been successfully applied to an asymmetric allylic substitution reaction. A palladium complex of one of the diamide ligands achieved enantio selectivities of up to 93% in the allylic alkylation of 1,3-diphenyl-3-acetoxyprop-1-ene. (C) 2008 Elsevier Ltd. All rights reserved.
PROCESS FOR PREPARATION OF AMINO ALCOHOLS
申请人:BASF SE
公开号:US20210155575A1
公开(公告)日:2021-05-27
A process for the preparation of amino alcohols includes condensing a compound of Formula (II), a stereoisomer, a tautomer, or a salt thereof with a compound of Formula (IIIa) or Formula (IIIb), a stereoisomer, a tautomer, or a salt thereof to form a condensation product; hydroxylating or acyloxylating the condensation product in the presence of an oxidant to obtain a hydroxylation or acyloxylation product; and subjecting the hydroxylation or acyloxylation product to one or more subsequent reactions comprising a hydrolysis reaction, alcohol deprotection, an amino lysis reaction, or a combination of two or more thereof to obtain an amino alcohol of Formula (I).