Pd(0)-catalyzed coupling-cyclization of 2-(2',3'-allenyl)acetylacetates and organic halides: an efficient synthesis of 4,5-dihydrofuran derivatives.
[reaction: see text] Highly chemo- and regioselective Pd(0)-catalyzed coupling-cyclization of 2-(2',3'-allenyl)acetylacetates with organic halides using K3PO4 as base in DMF efficiently afforded 4,5-dihydrofuran derivatives in moderate to excellent yields, with a selectivity of >97:3.
Ma
Shengming
S
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, P. R. China. masm@mail.sioc.ac.cn
Zheng
Zilong
Z
Jiang
Xuefeng
X