✦ LIBER ✦

A concise access to 2-allenylindole derivatives based on the palladium catalyzed cross-coupling reaction of indolylborates

✍ Scribed by Minoru Ishikura; Yukinori Matsuzaki; Isao Agata; Nobuya Katagiri

Publisher: Elsevier Science
Year: 1998
Tongue: French
Weight: 771 KB
Volume: 54
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(98)00861-8

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✦ Synopsis

The pailadium catalyzed cross-coupling reaction of trialkyl(indol-2-yl)borates with prop-2-ynyl carbonates was developed for the preparation of 2-allenylindole derivatives. When the reaction of indolylborates with tert-prop-2-ynyl carbonates was carried out, 2-allenylindoles were obtained solely. Otherwise, indolylborates reacted with sec-prop-2-ynyl carbonates, giving rise to 2-ailenylindoles and/or 3-(prop-2-ynyl)indoles depending on the catalyst used.

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