Synthesis of 2-Alkynyltetrahydrofuran Derivatives from Tetrahydrofuran and Alkynyl Bromides
摘要:
An efficient and general method for the synthesis of 2-alkynyltetrahydrofuran was developed. The regioselective functionalization of the C(sp(3))-H bond adjacent to an oxygen atom with various alkynyl bromides has been achieved under transition-metal-free reaction conditions. Sodium fluoride was found, for the first time, to promote the efficient functionalization process remarkably. Moreover, 1,2-dibromostyrenes were also found to be effective in this method forming 2-alkenyltetrahydrofurans.
[EN] NEW ARYLALKENYLPROPARGYLAMINE DERIVATIVES EXHIBITING NEUROPROTECTIVE ACTION FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES<br/>[FR] NOUVEAUX DÉRIVÉS ARYLALCÉNYLPROPARGYLAMINE FAISANT PREUVE D'ACTION NEUROPROTECTRICE POUR LE TRAITEMENT DES MALADIES NEURODÉGÉNÉRATIVES
申请人:SEMMELWEIS EGYETEM
公开号:WO2015087094A1
公开(公告)日:2015-06-18
The invention relates to novel arylalkenylpropargylamine derivatives of general formula (I) or enantiomers or diastereomers thereof or salts, optionally pharmaceutically acceptable salts, or solvates of any of these. The compounds can be used in treating or preventing a disease or condition in a mammal related to monoamine oxidase dysfunction, especially in neurodegenerative diseases, e.g. Parkinson's disease, Alzheimer's disease or Huntington's disease.
An efficient and general method for the synthesis of 2-alkynyltetrahydrofuran was developed. The regioselective functionalization of the C(sp(3))-H bond adjacent to an oxygen atom with various alkynyl bromides has been achieved under transition-metal-free reaction conditions. Sodium fluoride was found, for the first time, to promote the efficient functionalization process remarkably. Moreover, 1,2-dibromostyrenes were also found to be effective in this method forming 2-alkenyltetrahydrofurans.
Highly stereoselective synthesis of (Z)-1,2-dihaloalkenes by a Pd-catalyzed hydrohalogenation of alkynyl halides
作者:Gangguo Zhu、Dongxu Chen、Yuyi Wang、Renwei Zheng
DOI:10.1039/c2cc31553j
日期:——
An unprecedented Pd-catalyzed hydrohalogenation of alkynyl halides for the regio- and stereoselective synthesis of (Z)-1,2-dihaloalkenes has been realized using [(allyl)PdCl]2 as the catalyst and cis,cis-1,5-cyclooctadiene as the ligand. The advantages of this protocol are well illustrated by the assembly of trisubstituted (Z)-enynes and multifunctional benzenes via iterative cross-coupling reactions or tandem Diels–Alder–aromatization reactions, respectively.