Base-promoted selective β-fragmentation of homoallylamines
摘要:
A selective beta-fragmentation of homoallylamines with the combination of iodobenzene diacetate, iodine, and sodium acetate is reported. The desired carbon-carbon bond cleavage proceeded via a radical beta-scission pathway under mild conditions with good functional group tolerance. (C) 2010 Elsevier Ltd. All rights reserved.
Indium triflate-catalyzed allylation reactions of N-sulfonyl aldimines or N-alkoxycarbonylamino p-tolylsulfones with allyltrimethylsilane: synthesis of protected homoallylic amines
作者:Ponnaboina Thirupathi、Sung Soo Kim
DOI:10.1016/j.tet.2010.09.038
日期:2010.11
Indium triflate-catalyzed allylation reactions of N-sulfonyl aldimines or N-alkoxyloxycarbonylamino p-tolylsulfone with allyltrimethylsilane have been successfully developed to produce protected homoallylic amines.
Assembly of homoallylamine derivatives through iron-catalyzed three-component sulfonamidoallylation reaction
作者:Xiaohui Fan、Hong-Bo Zhu、Hao Lv、Kun Guo、Yong-Hong Guan、Xiao-Meng Cui、Bin An、Yan-Ling Pu
DOI:10.1002/aoc.3334
日期:2015.9
An efficient FeCl3‐catalyzed three‐component reaction between aldehydes, sulfonamides and allylsilanes has been achieved, which provides a convenient, atom‐economic and green way to construct homoallylaminederivatives. In addition, this reaction exhibits excellent syn stereoselectivity with γ‐substituted allylsilanes.
Imine allylation by allylic trimethylsilanes via in situ formation of N-tosyliminium species from carbonyl compounds and toluene-p-sulfonamide with SnCl2 and N-chlorosuccinimide: regioselection and diastereoselection
作者:Yoshiro Masuyama、Jiro Tosa、Yasuhiko Kurusu
DOI:10.1039/a902789k
日期:——
N-Tosyliminium species, prepared in situ from carbonyl compounds and TsNH2 with SnCl2 and N-chlorosuccinimide, undergo nucleophilic addition of allylic silanes (imine allylation) to produce the corresponding homoallylic amines; the imine allylation by but-2-enyltrimethylsilane with aldehydes and TsNH2 leads to regio- and diastereo-selection to produce anti 1-substituted 2-methylbut-3-enylamines.
Allylic trichlorotins, prepared in situ from α,α-diisopropylhomoallylic alcohols with tin(II) chloride and N-chlorosuccinimide in dichloromethane at -40 °C, cause nucleophilic addition to N-tosylimines or N-tosyliminiums to afford the corresponding α-substituted homoallylic amines.
PhI(OAc)2 induced intramolecular oxidative bromocyclization of homoallylic sulfonamides with KBr as the bromine source
作者:Renhua Fan、Fengqi Wen、Luoheng Qin、Dongming Pu、Bing Wang
DOI:10.1016/j.tetlet.2007.08.085
日期:2007.10
(Diacetoxyiodo)benzene (Phl(OAc)(2)) was found to be a powerful reagent to induce the intramolecular oxidative bromocyclization of homoallylic sulfonamides utilizing KBr as the bromine source. The reaction affords 2-substituted-4-bromo-pyrrolidines in moderate to excellent yields under a mild metal-free condition, and offers good manipulability by avoiding the use of highly toxic and caustic bromine (Br-2). (C) 2007 Elsevier Ltd. All rights reserved.