- A solvent-controlled highly efficient Pd-C catalyzed hydrogenolysis of benzaldehydes to methylbenzenes via a novel 'acetal pathway'
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Pd-C catalyzed hydrogenolysis of benzaldehydes to methylbenzenes has been described to proceed via a 'benzenemethanol pathway'. In this article, a novel 'acetal pathway' was first revealed by a systematic study when lower alcohols were used as solvents and a solvent-controlled highly efficient procedure was established.
- Xing, Lixin,Wang, Xinyan,Cheng, Chuanjie,Zhu, Rui,Liu, Bo,Hu, Yuefei
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p. 9382 - 9386
(2008/02/10)
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- Process for substituted 5-benzyl-2,4-diamino-pyrimidines
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A process for preparing a compound of the formula STR1 wherein R1 and R2 are lower alkoxy or taken together are METHYLENEDIOXY; R3 is lower alkyl or hydrogen, which comprises the step of reacting an aromatic compound of the formula STR2 wherein R1, R2 and R3 are as previously described, with a diamino-pyrimidine of the formula STR3 wherein R4 is lower alkoxy, benzyloxy, hydroxy or halogen, in the presence of an inorganic or organic acid selected from the group consisting of ortho-phosphoric acid, poly-phosphoric acid, hydrohalic acids and tri-haloacetic acids, at a temperature in the range of from about 50° C. to about 110° C., is described.
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