TFA‐Prompted/Rh(III)‐Catalysed Chemoselective C
3
− or C
2
−H Functionalization of Indoles with Methylenecyclopropanes
摘要:
AbstractThe TFA‐prompted/Rh(III)‐catalysed chemoselective C3−H alkylation, C2−H dienylation and cyclopropylation of indoles have been realized by virtue of methylenecyclopropanes as the versatile coupling partners. This protocol features broad substrate/functional group compatibility and tunable regio‐/chemoselectivity. Diversified derivatization of the obtained products has been also successfully demonstrated, which further strengthened the potential for the synthetic utility of the developed protocols.
Aryl and vinyl cyclopropanes through the in situ generation of B-cyclopropyl-9-BBN and its Suzuki–Miyaura coupling
作者:John A. Soderquist、Ramon Huertas、Gisela Leon-Colon
DOI:10.1016/s0040-4039(00)00605-5
日期:2000.6
Dihydroboration of propargyl bromide with 9-BBN-H followed by treatment of the adduct with aqueous sodium hydroxide affords the hydroxy(cyclopropyl)borate complex (1), which undergoes efficient palladium-catalyzed cross-coupling to produce a variety of aryl and vinyl cyclopropanes (2) in good to excellent yields. (C) 2000 Elsevier Science Ltd. All rights reserved.
BEAVERS W. A.; WILSON S. E.; GORDON B. Z.; BATES R. B.; ROMANO A. R., TETRAHEDRON LETT., 1979, NO 19, 1675-1678
作者:BEAVERS W. A.、 WILSON S. E.、 GORDON B. Z.、 BATES R. B.、 ROMANO A. R.
DOI:——
日期:——
Bailey William F., Gavaskar Kaustubh V., Tetrahedron, 50 (1994) N 20, S 5957-5970