Application of ene-like reactions of aldehydes with vinyl ethers: Facile assembly of benzazocenone intermediates for mitomycinoids
摘要:
Benzazocenone intermediates for mitomycinoids are now available in only six steps. Key phases of this sequence include the ene-like reaction of 2-methoxypropene with a 2-azidophenyacetaldehyde and a novel heterocyclic ring formation/expansion reaction. (C) 1997 Elsevier Science Ltd.
A remarkable ene-like reaction: Development and synthetic applications
摘要:
A catalytic ene-like reaction of aldehydes with those vinyl ethers that display the oxygen functionality at the central carbon of an allylic system, e.g., 2-methoxypropene, is discussed in detail. The reaction is promoted by 0.05 eguiv. of the 1:1 complex of Yb(fod)(3) and acetic acid, and it is forms the centerpiece of our synthesis of chlorovulone II, mitomycinoids and phyllanthocin. (C) 1997 Elsevier Science Ltd.
Yb(fod)3-promoted ene reaction of aldehydes with vinyl ethers
作者:Melissa V. Deaton、Marco A. Ciufolini
DOI:10.1016/s0040-4039(00)60428-8
日期:1993.4
Catalytic amounts of Yb(fod)3 catalyze a bimolecular ene-like reaction between ordinary aldehydes and vinyl ethers, in which the oxygen functionality is located at the central carbon of an allylic system, These reactions proceed at room temperature in high yield.