Artículos de revistas
Non-covalent Carbonyl-directed Heck-matsuda Desymmetrizations: Synthesis Of Cyclopentene-fused Spirooxindoles, Spirolactones, And Spirolactams
Registro en:
Advanced Synthesis & Catalysis. Wiley-v C H Verlag Gmbh, v. 359, p. 260 - 267, 2017.
1615-4150
1615-4169
WOS:000394583800009
10.1002/adsc.201600946
Autor
Kattela
Shivashankar; Heerdt
Gabriel; Correia
Carlos R. D.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Enantioselective carbonyl-directable Heck reactions using aryldiazonium salts were developed with the aim to construct chiral quaternary spiro centers in an efficient manner. Five-and six-membered spirooxindoles, spirolactones, and spirolactams (36 examples) were obtained in good to excellent isolated yields with diastereoselectivities ranging from 13:1 to >20:1, and enantiomeric excesses up to 99% in short reaction times (1.0-1.5 h) under mild conditions (40 degrees C). A rationale for the diastereo- and enantioselectivity based on an unprecedented non-covalent carbonyl group directing effect is also presented, and supported by computational calculations. 359 2 260 267 Sao Paulo Research Foundation (FAPESP) [2013/2014/25770-6, 2013/07600-3, 2014/05407-4] Brazilian National Research Council (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)