Electron transfer induced ring opening of 2-(bromomethyl)aziridines by magnesium in methanol
摘要:
Magnesium metal in methanol was used as a simple electron transfer induced ring-opening reagent of 2-(bromomethyl)aziridines to afford allylamines derivatives in 70-90% yield. (C) 2002 Elsevier Science Ltd. All rights reserved.
Direct Synthesis of Sulfonamides and Activated Sulfonate Esters from Sulfonic Acids
作者:Stephen Caddick、Jonathan D. Wilden、Duncan B. Judd
DOI:10.1021/ja0397658
日期:2004.2.1
the direct coupling of sulfonic acid salts with amines and alcohols using the reagenttriphenylphosphine ditriflate is described. A new reusable polymer-supported reagent for these transformations under heterogeneous conditions is also described. These methods provide a fundamentally new approach to making small molecules containing the sulfonamide functional group.
Di-μ-hydroxy-bis(N,N,N′,N′-tetramethylenediamine)-copper(II) chloride [Cu(OH)·TMEDA]2Cl2: an efficient, practical catalyst for benzylation and allylation of amides
An efficient protocol for the benzylation or allylation of amides using the corresponding benzyl or allyl chlorides as electrophiles under basic conditions with commercially available 5 mol % of [Cu(OH)TMEDA]2Cl2 as catalyst was developed. Under these conditions, unprotected amino acids were benzylated without any racemization.
A Gold Carbene Manifold to Prepare Fused γ-Lactams by Oxidative Cyclisation of Ynamides
作者:Fernando Sánchez-Cantalejo、Joshua D. Priest、Paul W. Davies
DOI:10.1002/chem.201804378
日期:2018.11.22
in γ‐lactam synthesis but are limited by preferential over‐oxidation to form α‐keto imides. Evaluating the factors that might limit N‐cyclisation pathways led to effective gold‐catalysed conditions that allow access to different fused γ‐lactams on changing the ynamide N‐substituent and accommodate previously incompatible substitution patterns. New and efficient methods for the synthesis of functionalised
Palladium-Catalyzed Cyclization-Heck Reaction of Allenamides: An Approach to 3-Methylene-5-phenyl-1,2,3,4-tetrahydropyridine Derivatives
作者:Fachao Yan、Hanbing Liang、Jian Song、Jie Cui、Qing Liu、Sheng Liu、Ping Wang、Yunhui Dong、Hui Liu
DOI:10.1021/acs.orglett.6b03364
日期:2017.1.6
4-tetrahydropyridine derivatives via palladium-catalyzed cyclization-Heck reaction of allenamides has been described. The 3-methylene-5-phenyl-1,2,3,4-tetrahydropyridine derivatives feature a nonconjugated diene, including one endo-enamine and one exocyclic double bond, which could be used for further transformation. Both aryl and vinylhalides performed very well under the standard conditions, delivering the
Twofold Radical-Based Synthesis of <i>N</i>,<i>C</i>-Difunctionalized Bicyclo[1.1.1]pentanes
作者:Helena D. Pickford、Jeremy Nugent、Benjamin Owen、James. J. Mousseau、Russell C. Smith、Edward A. Anderson
DOI:10.1021/jacs.1c04180
日期:2021.7.7
Bicyclo[1.1.1]pentylamines (BCPAs) are of growing importance to the pharmaceutical industry as sp3-rich bioisosteres of anilines and N-tert-butyl groups. Here we report a facile synthesis of 1,3-disubstituted BCPAs using a twofold radical functionalization strategy. Sulfonamidyl radicals, generated through fragmentation of α-iodoaziridines, undergo initial addition to [1.1.1]propellane to afford iodo-BCPAs;