Mass spectra of dicyanomethylene derivatives of benzophenone analogs
摘要:
AbstractThe dicyanomethylene derivative of a benzophenone analog significantly alters the fragmentation pattern observed during electron impact ionization of the underivatized parent compound. A double bond connecting the dicyanomethylene moiety to the parent compound is cleaved during a major fragmentation pathway for many of these compounds. A mechanism involving rearrangement of two hydrogen atoms is proposed to rationalize cleavage of this double bond. Conventional mass spectra as well as collisionally activated dissociation mass spectra of selected ions of several model compounds are reported and described in support of a proposed fragmentation mechanism.
Meerwein Arylation of Aryl(alkyl)idenemalononitriles and Diazonium Salts for the Synthesis of 2-(Aryl(alkyl)/arylmethylene)malononitrile Derivatives
作者:Xiaoqing Lv、Shengjun Liu、Yu Guo、Lijiu Gao、Liming Zhao、Jinpeng Zhang、Liangce Rong
DOI:10.1021/acs.joc.3c01161
日期:2023.9.1
arylation reaction from aryl(alkyl)idenemalononitriles and diazoniumsalts for the synthesis of 2-(aryl(alkyl)/arylmethylene)malononitrile derivatives under mild conditions was well developed. Different from the general addition reactions between alkenes and diazoniumsalts, this study performed the traditional coupling reaction for the formation of C(sp2)–C(sp2) bond arylation products. The radical reaction