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Rhodium-catalyzed asymmetric 1,4-addition of arylboron compounds generated in situ from aryl bromides

✍ Scribed by Yoshiaki Takaya; Masamichi Ogasawara; Tamio Hayashi

Book ID: 104262194
Publisher: Elsevier Science
Year: 1999
Tongue: French
Weight: 265 KB
Volume: 40
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(99)01412-4

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✦ Synopsis

Rhodium-catalyzed asymmetric 1,4-addition to 0t,13-unsaturated ketones is effected by use of arylborates, generated in situ by lithiation of aryl bromides followed by treatment with trimethoxyborane, to give the corresponding [3-aryl ketones of up to 99% ee in high yields. The addition of I equiv. (to arylborate) of water is essential for high chemical yields.

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