作者:Barry M. Trost、Zhongxing Huang
DOI:10.1002/anie.201900693
日期:2019.5.6
application of tailored aminoallyl precursors for catalytic (3+2) cycloaddition with conjugated dienes via a Pd‐aminoallyl intermediate. The new cycloaddition reactions override the conventional (4+3) selectivity of aminoallyl cation cycloaddition through a sequence of Pd‐allyl transfer and ring closure. A variety of highly substituted or fused pyrrolidine rings were synthesized using the cycloaddition, and can
我们描述了通过Pd-氨基烯丙基中间体与共轭二烯催化(3 + 2)环加成反应的量身定制的氨基烯丙基前体的设计和应用。通过一系列Pd-烯丙基转移和闭环反应,新的环加成反应超越了常规的(4 + 3)氨基烯丙基阳离子环加成反应。使用环加成反应可合成出各种高度取代或稠合的吡咯烷环,并可以用不同的钯催化剂进一步将[1,3] N-C重排为五元碳环。由双环吡咯烷产物制备各种衍生物也证明了(3 + 2)环加成的效用。