Practical Synthesis of 6-Amino-1-hydroxy-2,1-benzoxaborolane: A Key Intermediate of DNDI-6148
作者:Pankaj V. Khairnar、John M. Saathoff、Daniel W. Cook、Samuel R. Hochstetler、Urvish Pandya、Stephen J. Robinson、Vijay Satam、Kai O. Donsbach、B. Frank Gupton、Li-Mei Jin、Charles S. Shanahan
DOI:10.1021/acs.oprd.4c00031
日期:2024.4.19
2-methyl-5-nitroaniline as the starting material and features borylation of aniline and continuous flow hydrogenation as the key steps, with an overall yield of 46%. Both routes bypass the nitration of 1-hydroxy-2,1-benzoxaborolane, which is challenging and expensive to scale. In particular, the second approach is more practical and scalable because of the mild operating conditions and facile isolation