Synthesis of 1,4-Diazacycles by Hydrogen Borrowing
作者:Anju Nalikezhathu、Adriane Tam、Valeriy Cherepakhin、Van K. Do、Travis J. Williams
DOI:10.1021/acs.orglett.3c00468
日期:2023.3.17
4-diazacycles by diol–diamine coupling, uniquely made possible with a (pyridyl)phosphine-ligated ruthenium(II) catalyst (1). The reactions can exploit either two sequential N-alkylations or an intermediate tautomerization pathway to yield piperazines and diazepanes; diazepanes are generally inaccessible by catalyticroutes. Our conditions tolerate different amines and alcohols that are relevant to key