Regioselective Synthesis of Highly Substituted Aromatic Sulfides via Carbonyl−Alkyne Exchange Reaction
摘要:
Carbonyl-alkyne exchange reaction of 2,2-dimethyldihydropyran-4-thione-derived dienes with acetylenic ketones leads to highly substituted aromatic sulfides. The reaction proceeds with a high degree of regioselectivity and in good yields. Addition of Et2AlCl considerably increases the scope of usable acetylenic ketones. The starting materials, dihydropyran-4-one and alpha-alkynyl ketone derivatives, are readily available reactive building blocks. Additional diversity can be introduced through straightforward derivatization reactions at the sulfur atom. The use of solid-supported reagents and trapping agents allows the reaction to be carried out in a parallel format which might render such a concept attractive for the synthesis of compound libraries.
DOI:
10.1021/jo990110s
作为产物:
描述:
2,5,5-三甲基环己烷-1,3-二酮 以
various solvent(s) 为溶剂,
反应 24.0h,
以18%的产率得到2,3,6,6-tetramethyl-5,6-dihydro-4H-pyran-4-one
参考文献:
名称:
Saito, Kimitoshi; Yuki, Hidetaka; Ohyama, Toshiyuki, Canadian Journal of Chemistry, 1981, vol. 59, p. 1717 - 1721