作者:Liu Cai、Yu-Liang Pan、Li Chen、Jin-Pei Cheng、Xin Li
DOI:10.1039/d0cc05855f
日期:——
An efficient asymmetric allylation reaction of allylboronates with seven-membered cyclic imines, dibenzo[b,f][1,4]oxazepines, is described. The reaction, which is catalyzed by a Bi(OAc)3/CPA system, gives a range of chiral nitrogen-containing heterocycle structures in high yields and with good enantioselectivities. The conversion of these products to nitrogen-containing heterocycles is also demonstrated
Efficient Construction of Tetracyclic 1,2,4‐Triazoline‐Fused Dibenzo[
<i>b,f</i>
][1,4]oxazepines through KI/TBHP‐Mediated [3+2] Annulation between DBO‐Imines and
<i>N</i>
‐Tosylhydrazones
straightforward protocol for 1,2,4-triazoline-fused dibenzo[b,f][1,4]oxazepines is effectively established throughKI/TBHP-promoted [3+2] annulationbetweendibenzo[b,f][1,4]oxazepine-imines and N-tosylhydrazones under mild conditions. The produced 1,2,4-triazoline-fused DBOs could be easily converted into biologically interesting 1,2,4-triazolo-fused DBOs with excellent yields