Domino reactions starting from alkynyl esters tethered to 2-methyl-1,3-cycloalkanediones. Efficient access to polyfunctionalized diquinanes, allenoates, and oxetanes
摘要:
The reactivity of alkynyl esters tethered to 2-methyl-1,3-cycloalkanediones toward TBAF and TBAF in the presence of 4 angstrom molecular sieves is reported. Polyfunctionalized diquinanes, allenaotes or oxetanes resulting from anionic domino reactions can be readily available with high to complete diastereoselectivities. (C) 2010 Elsevier Ltd. All rights reserved.