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- W2358906629 abstract "Dimethyl 4,4′-diphenylmethanedicarbamate(MDC) was synthesized from 4,4′-diphenylmethanediamine(MDA) and dimethyl carbonate(DMC) over anhydrous zinc acetate.The optimum reaction conditions were n(Zn(CH3COO)2)∶n(MDA)=5∶1,n(DMC)∶n(MDA)=20∶1,reaction temperature 180 ℃ and reaction time 2 h.The yield of MDC was 98% while the conversion of MDA was 100% under these conditions.Meanwhile,the results of HPLC/MS/MS showed that the by-products consisted of mono carbamate and three N-methylated derivatives.Based on works aforementioned,the possible formation mechanism of N-methylated derivatives and the effect of by-product formation on the yield of MDC were discussed." @default.
- W2358906629 created "2016-06-24" @default.
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- W2358906629 date "2008-01-01" @default.
- W2358906629 modified "2023-09-26" @default.
- W2358906629 title "Synthesis of Dimethyl 4,4′-Diphenylmethanedicarbamate by the Reaction of 4,4′-Diphenylmethanediamine with Dimethyl Carbonate" @default.
- W2358906629 hasPublicationYear "2008" @default.
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