2-Nitroallyl carbonate-based green bifunctional reagents for catalytic asymmetric annulation reactions
作者:Alexey A. Kostenko、Kseniya A. Bykova、Alexander S. Kucherenko、Andrey N. Komogortsev、Boris V. Lichitsky、Sergei G. Zlotin
DOI:10.1039/d0ob02283g
日期:——
2-Nitroallylic carbonates, a new class of “green” 1,3-bielectrophilic reagents for organic synthesis and catalysis, have been prepared. The bifunctional tertiary amine-catalyzed asymmetric [3 + 3] annulations of cyclic enols with these reagents occur much faster than corresponding reactions with 2-nitroallylic esters and produce no acidic by-products poisoning the catalyst. Furthermore, 2-nitroallylic
制备了2-硝基烯丙基碳酸酯,一种用于有机合成和催化的新型“绿色” 1,3-双亲电子试剂。用这些试剂进行双官能叔胺催化的环状烯醇的不对称[3 + 3]环合发生的速度比与2-硝基烯丙基酯的相应反应快得多,并且不会产生使催化剂中毒的酸性副产物。此外,2-硝基烯丙基碳酸酯能够从带有药效团片段的可用前体中高度对映选择性地一锅合成各种稠合的二氢吡喃衍生物。