A series of 3-substituted N-Boc protected pyrrolidines have been prepared via iron catalysed cross-coupling between Boc protected N-allyl-N-(2-bromoallyl)amine 3 and organomagnesium compounds followed by ring closing metathesis and subsequent hydrogenation of the formed pyrrolines.
Palladium(0)-catalyzed intramolecular cross coupling of bromodialkenylamines, bromoalkenylalkenamides and bromodialkenyl ethers followed by in situ [4+2] cycloaddition with suitable dienophiles gave tetrahydroisoindolines (31−73% yield), tetrahydroisoindolin-1-ones (43−51%) and hexahydrobenzo[c]furans (35−55%), and hexahydro-1H-[2]pyrindines (66−75%), respectively, each in one-pot operations.
Multigram Synthesis of Heterabicyclo[n.1.0]alkan‐1‐yl Trifluoroborates
作者:Ihor Kleban、Yevhen Krokhmaliuk、Sofiia Reut、Serhii Shuvakin、Vyacheslav V. Pendyukh、Oleksandr I. Khyzhan、Dmytro S. Yarmoliuk、Andriy V. Tymtsunik、Yuliya V. Rassukana、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.202000977
日期:2021.12.21
Multigram synthesis of oxa‐ and azabicyclo[n.1.0]alkan‐1‐yl trifluoroborates relying on efficient 4–5‐step reaction sequences is described. The title compounds was obtained in up to 50 g scale in a single run (10–41 % overall yield).
本文描述了依赖于有效的4-5步反应序列的oxa-和氮杂双环[ n .1.0]烷烃-1-基三氟硼酸酯的合成方法。一次即可获得高达50 g的标题化合物(总收率10–41%)。