Synthesis of ethyl 4-chloro-2-oxobut-3-ynoate and its addition to alkyl vinyl ethers

Abstract

Ethyl 4 chloro 2 oxobut 3 ynoate has been synthesized for the first time and its addition to alkyl vinyl ethers of various structures has been studied.

Synthesis and unusual [2+2] cycloaddition reactions of haloacetylenes activated with the trifluoroacetyl group

“…This compound was syn thesized by the known procedure. 17 1,1,1 Trifluoro 4 (trimethylstannyl)but 3 yn 2 one (2).Tri fluoroacetic anhydride (63.0 g, 0.30 mol) was added in one por tion to a stirred solution of acetylene 1 (100.0 g, 0.28 mol) Fig. 1.…”