46209-55-6Relevant articles and documents
Green synthesis method of methyl cyclopentenolone
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Paragraph 0049-0051, (2020/12/05)
The invention relates to a green synthesis method of methyl cyclopentenolone, and belongs to the field of organic synthesis. The method comprises the following synthesis steps: A, carrying out Mannichreaction on 2-methyl furan serving as a raw material and piperidine hydrochloride to generate an aminated intermediate; B, adding a catalytic amount of sulfuric acid into the aminated intermediate for reflux reaction to obtain a hydrolysate; and C, adding the hydrolysate into methylbenzene, neutralizing to be neutral by using sodium hydroxide, adding piperidine and pyridine, refluxing and separating water until no water is separated out, and rectifying to obtain a cyclized product; and D, putting the cyclized product into an acetic acid-hydrochloric acid solution for reflux reaction, cooling,removing piperidine hydrochloride, removing acetic acid from the filtrate, adding water, and crystallizing to obtain methyl cyclopentenolone. According to the method, the generation of wastewater andwaste salt is greatly reduced, the generated piperidine hydrochloride can be recycled and reused, and the method is a green synthetic method for synthesizing methyl cyclopentenolone.
aminoalkylbenzotriazoles: Reagents for the aminoalkylation of electron rich heterocycles
Katritzky,Yang,Lam
, p. 4971 - 4978 (2007/10/02)
Secondary and tertiary aminoalkylbenzotriazoles react with pyrrole, indole, their N-methyl analogs and with 2-methylfuran under mild reaction conditions in the presence of a Lewis acid to afford selectively the corresponding secondary or tertiary amines.