An efficient Pd(ii)-catalyzed direct O-alkenylation of 2-arylquinazolinones with simple ketone-derived N-tosylhydrazones is reported.
报道了一种高效的Pd(II)催化的直接2-芳基喹唑酮与简单酮衍生的N-对甲苯磺酰肼烯烃化反应。
Enantioselective Synthesis of Trisubstituted Allenes via Cu(I)-Catalyzed Coupling of Diazoalkanes with Terminal Alkynes
作者:Wen-Dao Chu、Lei Zhang、Zhikun Zhang、Qi Zhou、Fanyang Mo、Yan Zhang、Jianbo Wang
DOI:10.1021/jacs.6b09674
日期:2016.11.9
A highly enantioselectivesynthesis of trisubstituted allenes has been achieved through Cu(I)-catalyzed cross-coupling of aryldiazoalkanes and terminal alkynes with chiral bisoxazoline ligands. Alkynyl migratory insertion of Cu(I) carbene is proposed as the key step for the construction of axialchirality.
A Novel Synthesis of Arylsulfonyl Hydrazine Derivatives Via the Reaction of Arylsulfonyl Hydrazone Salts and Hydrazonoyl Chlorides
作者:Gholamhossein Khalili
DOI:10.1080/10426507.2013.865122
日期:2014.12.2
GRAPHICAL ABSTRACT Abstract An efficient method for the synthesis of arylsulfonyl hydrazines and diazo compounds via arylsulfonyl hydrazone salts is described. The reaction was performed in DMF using hydrazonoyl chlorides and sodium arylsulfonyl hydrazones, which were easily prepared from carbonyl compounds.
On the scope of the Pt-catalyzed Srebnik diborylation of diazoalkanes. An efficient approach to chiral tertiary boronic esters and alcohols via B-stabilized carbanions
作者:Andrew J. Wommack、Jason S. Kingsbury
DOI:10.1016/j.tetlet.2014.03.135
日期:2014.5
Conditions milder than those previously reported are shown to be generally applicable to the Pt-catalyzed insertion of non-carbonyl-stabilized diazoalkanes into B(2)pin(2). Selective transformation of one (pinacolato)boryl unit in the products is enabled by rapid, low-temperature deboronation in the presence of a Lewis base and genesis of a highly reactive B-stabilized carbanion. (C) 2014 Published by Elsevier Ltd.