Synthesis of β-ketonitriles, α,β-alkynones and biscabinols from esters using tert-butoxide-assisted C(O)–C (i.e., acyl–C) coupling under ambient conditions
摘要:
We demonstrated the synthesis of beta-ketonitriles, alpha,beta-alkynones, and biscarbinols using tert-butoxideassisted C(C=O)-C (i.e., acyl-C) coupling of esters under ambient conditions. tert-Butoxide-assisted C(C=O)-C (i.e., acyl-C) coupling of esters with cyanomethylenes and acetylenes under transition metalfree ambient conditions gives beta-ketonitriles, alpha,beta-alkynones and/or aryl bis(phenylethynyl)carbinols in moderate-to-good yields. It is noteworthy that this is a rapid, facile, and efficient process under ambient conditions, and use of cheap and stable starting materials. (C) 2013 Elsevier Ltd. All rights reserved.
Tandem Gold(III)-Catalyzed Amination-Intramolecular Hydroamination Reactions of 1-En-4-yn-3-ols with Sulfonamides: Efficient Approach to Highly Substituted Pyrroles
A simple, convenient and efficient synthetic approach to highlysubstitutedpyrroles has been developed by utilizing a gold(III)-catalyzedtandemamination-intramolecularhydroaminationreaction. The first examples of gold-catalyzed, selective amination of 1-en-4-yn-3-ols have also been disclosed.
Synthesis of β-ketonitriles, α,β-alkynones and biscabinols from esters using tert-butoxide-assisted C(O)–C (i.e., acyl–C) coupling under ambient conditions
We demonstrated the synthesis of beta-ketonitriles, alpha,beta-alkynones, and biscarbinols using tert-butoxideassisted C(C=O)-C (i.e., acyl-C) coupling of esters under ambient conditions. tert-Butoxide-assisted C(C=O)-C (i.e., acyl-C) coupling of esters with cyanomethylenes and acetylenes under transition metalfree ambient conditions gives beta-ketonitriles, alpha,beta-alkynones and/or aryl bis(phenylethynyl)carbinols in moderate-to-good yields. It is noteworthy that this is a rapid, facile, and efficient process under ambient conditions, and use of cheap and stable starting materials. (C) 2013 Elsevier Ltd. All rights reserved.