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Synthesis of carbo- and aza-bicyclo[4.3.0] and [4.4.0] compounds by Ti(II)-mediated cyclization of 2,7- or 2,8-enynyl-1-ol derivatives

✍ Scribed by Yongcheng Song; Sentaro Okamoto; Fumie Sato

Publisher: Elsevier Science
Year: 2002
Tongue: French
Weight: 75 KB
Volume: 43
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(02)01474-0

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✦ Synopsis

The reaction of 2,7-and 2,8-enynyl-1-ol derivatives where the ene moiety is a part of a ring with a Ti(O-i-Pr) 4 /2 i-PrMgCl reagent proceeds smoothly with excellent stereoselectivity to afford carbo-or aza-bicyclo[4.3.0] and [4.4.0] compounds, respectively, in high yields.

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