Dichotomy of Reductive Addition of Amines to Cyclopropyl Ketones vs Pyrrolidine Synthesis
作者:Oleg I. Afanasyev、Alexey A. Tsygankov、Dmitry L. Usanov、Denis Chusov
DOI:10.1021/acs.orglett.6b02945
日期:2016.11.18
interesting catalytic dichotomy was discovered: switching between simple ligand-free catalysts leads to fundamentally different outcomes of reductive reaction between amines and α-carbonylcyclopropanes. Whereas a rhodium catalyst leads to the traditional reductive amination product, ruthenium catalysis enables a novel reaction of pyrrolidine synthesis via ring expansion. The protocols do not require an
Formation of pyrrolidines by the titanocene(II)-promoted intramolecular reaction of N-[3,3-bis(phenylthio)propyl]anilides
作者:Takeshi Takeda、Jun Saito、Akira Tsubouchi
DOI:10.1016/s0040-4039(03)01385-6
日期:2003.7
titanium carbene complexes generated by the desulfurization of thioacetals with the titanocene(II) species Cp2Ti[P(OEt)3]2 produced the corresponding enamines. Unusual formation of pyrrolidines was observed when N-[3,3-bis(phenylthio)propyl]anilides were treated with the titanocene(II) reagent.
乙醛与硫代缩醛与钛茂(II)物种Cp 2 Ti [P(OEt)3 ] 2脱硫生成的钛卡宾配合物反应生成相应的烯胺。当用钛茂(II)试剂处理N- [3,3-双(苯硫基)丙基]苯胺时,观察到吡咯烷的异常形成。