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ChemInform Abstract: Efficient Synthesis of 7-, 8-, and 9-Membered Cyclic Allyltitanium Compounds and Their Stereoselective Addition Reaction with Aldehydes and Imines.

✍ Scribed by S. HIKICHI; Y. GAO; F. SATO

Publisher: John Wiley and Sons
Year: 2010
Weight: 33 KB
Volume: 28
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199732069

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✦ Synopsis

Efficient Synthesis of 7-, 8-, and 9-Membered Cyclic Allyltitanium Compounds and Their Stereoselective Addition Reaction with Aldehydes and Imines.

-The reaction of the cyclic allylic compounds (I) with in situ generated (η2-propene)Ti(O-iPr)2 gives allylic titanium compounds via an oxidative pathway. Quenching with aldehydes results in syn-selective formation of cycloalkenyl alcohols. Interestingly, quenching with the imine (V) gives a high anti-selectivity for the resulting amines. -(HIKICHI, S.; GAO,

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