Hayakawa I, Matsumaru N, Sakakura A. Toward the Synthesis of Paspaline-Type Indole-Terpenes: Stereoselective Construction of Core Scaffold with Contiguous Asymmetric Quaternary Carbon Centers.
J Org Chem 2021;
86:9802-9810. [PMID:
34231354 DOI:
10.1021/acs.joc.1c01193]
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Abstract
The core scaffold of paspaline-type indole-terpenes was synthesized by using the House-Meinwald rearrangement as a key step. Rearrangement of the epoxide methyl group in the precursor with methylaluminum bis(4-bromo-2,6-di-tert-butylphenoxide) as a Lewis acid proceeded smoothly to construct contiguous asymmetric quaternary carbon centers by a 1,2-chirality transfer.
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