BiI3 mediated difunctionalization of α-methylstyrenes, including azidohydroxylation and azidoiodination
摘要:
BiI3 mediated vicinal azidohydroxylation of alpha-methylstyrenes 1 with NaN3 in wet DMF affords beta-azidoalcohols 4 in good yields. In dry DMF, beta-azidoiodides 6 are also obtained by BiI3 mediated vicinal azidoiodination of a-methylstyrenes I with NaN3. This present protocol provides the bond formations of carbon-azido/carbon-hydroxy (N-3-CC-OH) bond and carbon-azido/carbon-iodo (N-3-CC-I) under water-controlled conditions. (C) 2018 Elsevier Ltd. All rights reserved.
Tertiary and Quaternary Carbon Formation via Gallium-Catalyzed Nucleophilic Addition of Organoboronates to Cyclopropanes
作者:Truong N. Nguyen、Jeremy A. May
DOI:10.1021/acs.orglett.7b03349
日期:2018.1.5
via homoconjugate addition of organoboron nucleophiles to diester- and ketone-functionalized cyclopropanes. Electron donor group cyclopropane substituents were not needed, allowing electron-deficient aryl, alkenyl, alkyl, and hydrogen-substituted cyclopropanes to be used. The catalytic conditions were compatible with alkenyl, alkynyl, and arylnucleophiles, including ortho-substituted aromatics, to
Ni-Catalyzed Reductive Allylation of α-Chloroboronates to Access Homoallylic Boronates
作者:Yixian Lou、Jian Qiu、Kai Yang、Feng Zhang、Chenglan Wang、Qiuling Song
DOI:10.1021/acs.orglett.1c01213
日期:2021.6.18
transition-metal-catalyzed allylation reaction is an efficient strategy for the construction of new carbon–carbon bonds alongside allyl or homoallylic functionalization. Herein we describe a Ni-catalyzed reductive allylation of α-chloroboronates to efficiently render the corresponding homoallylic boronates, which could be readily converted into valuable homoallylic alcohols or amines or 1,4-diboronates
过渡金属催化的烯丙基化反应是在烯丙基或均烯丙基官能化的同时构建新碳-碳键的有效策略。在本文中,我们描述了 α-氯硼酸酯的 Ni 催化还原烯丙基化,以有效地生成相应的高烯丙基硼酸酯,其可以很容易地转化为有价值的高烯丙基醇或胺或 1,4-二硼酸酯。该反应具有广泛的底物范围和良好的官能团兼容性,是对现有制备高烯丙基硼酸酯方法的补充。
Carbocation-Forming Reactions in Ionic Liquids
作者:Xavier Creary、Elizabeth D. Willis、Madeleine Gagnon
DOI:10.1021/ja0536623
日期:2005.12.1
water in the ionic liquid. The triflate derivative of pivaloin, trans-2-phenylcyclopropylcarbinyl mesylate, 2,2-dimethoxycyclobutyl triflate, the mesylate derivative of diethyl (phenylhydroxymethyl)-thiophosphonate, and Z-1-phenyl-5-trimethylsilyl-3-penten-1-yl trifluoroacetate all give products derived carbocation rearrangements (kDelta processes). anti-7-Norbornenyl mesylate gives products with complete
[EN] PESTICIDAL COMPOSITIONS AND PROCESSES RELATED THERETO<br/>[FR] COMPOSITIONS PESTICIDES ET PROCÉDÉS CORRESPONDANTS
申请人:DOW AGROSCIENCES LLC
公开号:WO2014011429A1
公开(公告)日:2014-01-16
This document discloses molecules having the following formula ("Formula One"). The molecules disclosed in this document are related to the field of processes to produce molecules that are useful as pesticides (e.g., acaricides, insecticides, molluscicides, and nematicides), such molecules, and processes of using such molecules to control pests.
The Crabtree’s reagent catalyzes the isomerization of N-sulfonyl 2,2-disubstituted aziridines to allyl amines. The selectivity of allyl amine vs imine is very high (up to 99/1). The unprecedented isomerization takes place in mild conditions without activation of the catalyst by hydrogen. The mechanism has been studied computationally by DFT calculations; instead of the usual hydrogenation of COD, the