Hg/Pt-catalyzed conversion of bromo alkynamines/alkynols to saturated and unsaturated γ-butyrolactams/lactones via intramolecular electrophilic cyclization
Convenient and general Hg(II)/Pt(IV) catalyzed syntheses of γ-butyrolactams and α,β-unsaturated γ-butyrolactones/lactams are described via intramolecular electrophilic cyclizations of bromoalkynes with tosylamino and hydroxyl tethers. The reaction features the use of wet solvents, the exclusion of any base and additive, mild conditions and practical yields. We also synthesised few chiral lactams through
An Efficient, Practical, and Enantioselective Method for Synthesis of Homoallenylamides Catalyzed by an Aminoalcohol-Derived, Boron-Based Catalyst
作者:Hao Wu、Fredrik Haeffner、Amir H. Hoveyda
DOI:10.1021/ja500374p
日期:2014.3.12
A practical catalytic method for enantioselective addition of an allene unit to aldimines is disclosed. Transformations are promoted by an in-situ-generated B-based catalyst that is derived from a simple, robust, and readily accessible (in multigram quantities) chiral aminoalcohol. A range of aryl-, heteroaryl-, and alkyl-substituted homoallenylamides can be obtained in 66–91% yield and 84:16 to >99:1
Redox Economic Synthesis of TrisubstitutedPiperidones via Ruthenium Catalyzed Atom‐Economic Couplings of N‐Protected 1,5‐Aminoalcohols and Michael Acceptors
作者:Barry M. Trost、Debayan Sarkar、Nabakumar Bera
DOI:10.1002/adsc.201900881
日期:2019.12.17
An efficient atom‐economic coupling of 1,5‐amino alcohols and Michael acceptors has been developed employing [CpRu(MeCN)3]PF6 as a key catalyst to synthesize α,β‐unsaturated ketones with exclusive generation of E‐geometrical isomers at room temperature without any co‐catalyst and additives. A base catalysed 6‐endo‐trig cyclization of the α,β‐unsaturated ketone delivers a direct access to tri‐substituted
[EN] ALPHA2B AND ALPHA2C AGONISTS<br/>[FR] AGONISTES D'ALPHA2B ET D'ALPHA2C
申请人:ALLERGAN INC
公开号:WO2009137340A1
公开(公告)日:2009-11-12
Described herein are compounds that can be useful as bioactive agents. More specifically, the compounds described herein can be useful as both α2B and α2c adrenergic agonists. Methods of synthesis and administration of the compounds are also disclosed. The compounds are N-substituted 2-amino oxazolidines.