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2005
Reactions of organo-metal compounds
O 0350
Formation of Azatitanacyclopentanes from Ene-Imines and a Ti(O-iPr)4/
Reagent and Their Synthetic Reactions. — A divalent titanium reagent,
11- 074 2iPrMgX
generated in situ, efficiently cyclizes ene-imines to intermediate azatitanacycles with
moderate to good diastereoselectivity. Quenching with electrophiles other than H+ offers an access to functionalized derivatives. Interestingly, quenching with formaldehyde produces 2,3-annulated pyrrolidines (VIII). — (UCHIKAWA, W.; MATSUNO,
C.; OKAMOTO*, S.; Tetrahedron Lett. 45 (2004) 49, 9037-9040; Dep. Appl. Chem.,
Fac. Eng., Kanagawa Univ., Kanagawa, Yokohama 221, Japan; Eng.) — Mais
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