Green synthesis of dissymmetric bisarylidene derivatives of cyclohexanone analogues under ultrasonic conditions
作者:Mohammad M. Mojtahedi、Leila Afshinpoor、Fatemeh Karimi、M. Saeed Abaee
DOI:10.1007/s13738-018-1498-5
日期:2019.2
AbstractA new procedure is developed for the synthesis of dissymmetric bisarylidene derivatives of two cyclohexanone analogues. Under mild ultrasonic/organocatalytic conditions, the first aldehyde reacts with the ketone to give the monoarylidene intermediate which subsequently condenses with the second aldehyde upon addition of NaOH/MeOH to the reaction mixture. Both condensations proceed in one pot
high yield synthesis of monoarylidene derivatives of cyclic systems directly from the reaction of ketone with various aldehydes under solvent-free conditions. Reactions took place rapidly in the presence of catalytic amounts of pyrrolidine, while no significant formation of the undesired bis by-products was observed. Moreover, the procedure was applicable to both homo- and heterocyclicketones.
A library of novel bis-spiropiperidone–tetrahydrothiophene hybrid heterocycles have been synthesized via pseudo-three-component dominoreaction of (3 E ,5 E )-3,5-bis(arylidene)-1-methyl/benzyl piperidin-4-ones and 1,4-dithiane-2,5-diol in the presence of triethylamine. This transformation presumably proceeds via two annulations each involving the generation of 2-mercaptoacetaldehyde from 1,4-dithiane-2
通过 (3 E ,5 E )-3,5-双(亚芳基)-1-甲基/苄基哌啶-4-酮的假三组分多米诺反应合成了新型双螺哌啶酮-四氢噻吩杂环化合物库和 1,4-二噻烷-2,5-二醇在三乙胺的存在下。这种转化大概是通过两个环化进行的,每个环化都涉及从 1,4-二噻烷-2,5-二醇-迈克尔加成-分子内醛醇序列生成 2-巯基乙醛,这导致在一锅操作中产生四个新键。该协议的优点是原子经济性高、立体选择性高、反应时间短、操作简单。
OSZBACH G.; SZABO D., MAQY. KEM. FOLYOIRAT, 1979, 85, NO 4, 191-192
作者:OSZBACH G.、 SZABO D.
DOI:——
日期:——
BELL, K. H.;FULLICK, G., AUSTRAL. J. CHEM., 1985, 38, N 4, 625-628