time. These chiral compounds were synthesized by a three-component 1,3-dipolar cycloaddition of (E)-1-(2-oxoacenaphthylen-1(2H)-ylidene) pyrrolidin-1-ium-2-ide as a dipolar and (S)-cinnamoyl/crotonoyl oxazolidinone as a dipolarophile. The absolute configuration of cycloadducts was confirmed by X-ray diffraction analysis. The origin of catalyst reactivity and regio- and stereoselectivity was investigated
首次描述了与Schreiner的
硫脲有机催化剂进行的有效有机催化[3 + 2]反应,用于合成具有高区域选择性和非对映选择性(最高99%)的新型对映纯稳定螺环ac啶基
吡咯烷/
吡咯烷核苷的小型文库。这些手性化合物是通过三组分的(E)-1-(2-氧ac基
萘-1(2H)-亚烷基)
吡咯烷-1-鎓-2-基的三组分1,3-偶极环加成而合成的(S )-肉桂酰基/
巴豆酰基
恶唑烷酮为双极性亲和剂。通过X射线衍射分析确认了环加合物的绝对构型。通过DFT计算研究了催化剂反应性以及区域和立体选择性的起源。DFT计算表明,区域选择性受反应物和Schreiner's的变形(变形)控制。