| 摘要 |
A new process for obtaining a hydroxy-benzaldehyde comprises oxidn. of the corresp. hydroxy-benzylic alcohol using mol. O2 (or a gas contg. it) in an aq. medium contg. an alkaline agent in the presence of a Pt-based catalyst,and also in the presence of a B deriv. and a Bi deriv. as co-catalyst. Also claimed is a variation of the process, in which the B deriv. is introduced during prepn. of the hydroxy-benzylic alcohol, by reacting boric acid (or anhydride) with a phenol (to form the ether) followed by reaction with HCHO (or a generator of HCHO). The reaction is then completed by oxidn. using the catalyst system defined above. |
