One-Pot Synthesis of Less Accessible <i>N</i>-Boc-Propargylic Amines through BF<sub>3</sub>-Catalyzed Alkynylation and Allylation Using Boronic Esters
作者:Kento Yasumoto、Taichi Kano、Keiji Maruoka
DOI:10.1021/acs.orglett.9b00931
日期:2019.5.3
amines is described via an alkynylation or allylation of alkynyl-substituted N-Boc-imines. Our strategy relies on the BF3-mediated in situgeneration of alkynyl imines followed by alkynylation or allylation with the corresponding boronic esters. A range of lessaccessible N-Boc-propargylic amines were obtained in moderate to good yields under mild and acidic conditions with higher atom economy compared
The first successful asymmetric transfer of rhodium-alkynyl species to symmetrical strained alkenes has been realized starting from bicyclic hydrazines and alkynylboronic esters.
从双环肼和炔基硼酸酯开始,成功实现了铑-炔基物种向对称应变烯烃的首次成功不对称转移。
General synthesis of 2-alkyn-1-ylboronates in excellent isomeric purity
作者:Raman Soundararajan、Guisheng Li、Herbert C. Brown
DOI:10.1016/0040-4039(94)88400-5
日期:1994.11
2-Alkyn-1-ylboronates have been synthesized successfully, in excellentisomericpurity, via the in situ homologation of alkyn-1-ylboronates with LiCH2I. The relative reactivities exhibited by various LiCH2X reagents (X=Cl; Br; I) are described.
Boron Trifluoride Etherate Mediated 1,4-Addition of (1-Alkynyl)diisopropoxyboranes to α,β-Unsaturated Ketones. A Convenient New Route to 3-Alkynyl Ketone Synthesis
In the presence of BF3 etherate, (1-alkynyl)diisopropoxyboranes react with α,β-unsaturatedketones to give 1,4-addition products selectively in good yields.
作者:Masafumi Hirano、Ayumi Kuramochi、Keita Shimada、Nobuyuki Komine、Sayori Kiyota、Stephen A. Westcott
DOI:10.1039/c9cc05930j
日期:——
A series of borylated conjugated trienes and skipped dienes is prepared by Ru-catalysed cross-dimerisation using alkynyl-, dienyl-, and vinyl boronates.