<i>Endo</i> Selectivity in the (4 + 3) Cycloaddition of Oxidopyridinium Ions
作者:Wanna Sungnoi、Angus B. Keto、Ras Baizureen Roseli、Jinchu Liu、Heather Wang、Chencheng Fu、Erik L. Regalado、Elizabeth H. Krenske、Michael Harmata
DOI:10.1021/acs.orglett.1c03028
日期:2021.11.5
The (4 + 3) cycloaddition of 2-trialkylsilyl-4-alkylbutadienes with an N-methyloxidopyridinium ion affords cycloadducts with high regioselectivity and excellent endo selectivity.
Tropane Skeleta from the Intramolecular Photocycloaddition of (4+3) Cycloadducts of Oxidopyridinium Ions and Dienes
作者:Chencheng Fu、Wanna Sungnoi、Jianzhuo Tu、Steven P. Kelley、Michael Harmata
DOI:10.1021/acs.orglett.2c01228
日期:2022.5.20
Easily prepared cycloadducts derivedfrom the (4+3) cycloaddition of oxidopyridinium ions with dienes reacted intramolecularly in a [2+2] cycloaddition process to afford complex polycyclic species in which the tropane skeleton was embedded.
Oxidative bridgehead functionalization of (4 + 3) cycloadducts obtained from oxidopyridinium ions
作者:Wanna Sungnoi、Michael Harmata
DOI:10.1039/d2ra05189c
日期:——
Treatment of selected (4 + 3) cycloadducts derivedfrom oxidopyridinium ions with N-iodosuccinimide (NIS) in hexafluoroisopropanol (HFIP) resulted in the formation of bridgehead ethers via a net oxidative C–H activation.