ECTONUCLEOTIDE PYROPHOSPHATASE-PHOSPHODIESTERASE-1 INHIBITORS AND PHARMACEUTICAL COMPOSITIONS COMPRISING THE SAME
摘要:
The present disclosure relates compounds for inhibiting ectonucleotide pyrophosphatase/phosphodiesterase-1 (ENPP-1), or a pharmaceutically acceptable salts thereof.
Synthesis of 1<i>H</i>-Indole-2,3-dicarboxylates via Rhodium-Catalyzed C–H Annulation of Arylhydrazines with Maleates
作者:Sheng Zhang、He Li、Yoshinori Yamamoto、Ming Bao
DOI:10.1021/acs.joc.0c01727
日期:2020.10.2
This work describes a one-step synthesis of 1H-indole-2,3-dicarboxylates through C–Hactivation. Rhodium-catalyzed tandem C–Hactivation and annulation of 2-acetyl-1-phenylhydrazines with maleates proceeded smoothly in the presence of additive NaOAc and oxidant Ag2CO3 and produced the corresponding indole derivatives, 1H-indole-2,3-dicarboxylates, in satisfactory to good yields. A variety of useful
这项工作描述了通过C–H活化的1 H-吲哚-2,3-二羧酸酯的一步合成。在添加剂NaOAc和氧化剂Ag 2 CO 3的存在下,铑催化的串联C–H活化和2-乙酰基-1-苯基肼与马来酸酯的环合反应顺利进行,并产生了相应的吲哚衍生物1 H-吲哚-2,3-二羧酸盐,令人满意的好收率。苯环上可耐受各种有用的官能团,包括卤素原子(F,Cl,Br和I)和甲氧羰基。
Shi, Zhuangzhi; Zhang, Chun; Li, Si, Angewandte Chemie - International Edition, 2009, vol. 48, p. 4572 - 4576
Reaction of 1-(4-benzyloxyphenyl)-2-phenylhydrazine with dimethyl acetylenedicarboxylate (DMAD) gave dimethyl 5-benzyloxyindole-2,3-dicarboxylate and dimethyl indole-2,3-dicarboxylate. However, treatment of 1-(2-bromophenyl)2-phenylhydrazine with DMAD afforded dimethyl 7-bromoindole-2,3-dicarboxylate, exclusively. In a similar manner, dimethyl 7-bromo-5-methoxyindole-2,3-dicarboxylate was also obtained from 1-(2-bromo-4-methoxyphenyl)-2phenylhydrazine. The bromo group of dimethyl 7-bromoindole-2,3-dicarboxylate was converted to an 1-ethoxyvinyl or vinyl group by treatment with tributyl-(1-ethoxyvinyl)tin or tributyl(vinyl)tin in the presence of a Pd(O) catalyst.