The Heck reaction with unprotected allylic amidines and guanidines
作者:Edward C Lawson、William A Kinney、Diane K Luci、Stephen C Yabut、David Wisnoski、Bruce E Maryanoff
DOI:10.1016/s0040-4039(02)00182-x
日期:2002.3
The applicability of Heck methodology to the introduction of unprotected amidines and guanidines was investigated. Unprotected guanidine-substituted olefins were coupled to various simple aryl iodides, and this methodology was then applied to a highly functionalized 6-iodoquinazolinone substrate, providing an efficient synthesis of a new class of vitronectin receptor (αVβ3 integrin) antagonists.
研究了Heck方法对引入未保护的am和胍的适用性。未受保护的胍基取代烯烃被耦合到各种简单芳基碘,然后这个方法适用于高度官能化6- iodoquinazolinone衬底,提供一类新的玻连蛋白受体的一种高效合成(α V β 3整联)拮抗剂。
A direct synthesis of carbaldehydes through intramoleculardehydrogenativeaminooxygenation has been developed. The process uses a catalytic amount of copper(II) in DMF or DMA under oxygen and does not require additional oxidants (see scheme). Mechanistic studies suggest that the carbonyl oxygen atom of the aldehyde is derived from oxygen through a copper‐mediated oxygen activation process via a peroxy–copper(III)