期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 365, 期 5, 页码 715-721出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.202201310
关键词
p-quinols; 3-formylchromones; [3+2] cyclization; deformylation; benzopyrone
The construction of benzopyrone-fused hydrobenzofuranones via DABCO-catalyzed [3+2] cyclization/deformylation cascade of p-quinols with 3-formylchromones is described. The reaction provides the desired products in 53-90% yields with complete diastereoselectivities under mild conditions. Furthermore, an enantioselective version with 81% ee is also achieved in the presence of Takemoto's chiral thiourea catalyst.
The construction of benzopyrone-fused hydrobenzofuranones via DABCO-catalyzed [3+2] cyclization/deformylation cascade of p-quinols with 3-formylchromones is described. The reaction works under mild reaction conditions to provide the desired products in 53-90% yields with complete diastereoselectivities. In addition, an enantioselective version with 81% ee is also realized in the presence of Takemoto's chiral thiourea catalyst.
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