Invented are non-peptide TPO mimetics. Also invented are novel processes and intermediates used in the preparation of the presently invented compounds. Also invented is a method of treating thrombocytopenia, in a mammal, including a human, in need thereof which comprises administering to such mammal an effective amount of a selected hydroxy-
1
-azobenzene derivative.
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。
Redox-Neutral Rhodium(III)-Catalyzed Annulation of Arylhydrazines with Sulfoxonium Ylides To Synthesize 2-Arylindoles
A rhodium-catalyzed redox-neutral reaction of arylhydrazines with sulfoxonium ylides to construct 2-arylindole derivatives in one pot has been developed. The transformation proceeds efficiently under mild conditions and involves tandem C-H activation and an intramolecular dehydration annulation sequence, providing a straightforward pathway to access pharmaceutically and biologically valuable 1-aminoindole
Rhodium(<scp>iii</scp>)-catalyzed C–H annulation of 2-acetyl-1-arylhydrazines with sulfoxonium ylides: synthesis of 2-arylindoles
作者:He Li、Ye Lu、Xinxin Jin、Shuang Sun、Limei Duan、Jinghai Liu
DOI:10.1039/d0ra07701a
日期:——
An efficient Rh(III)-catalyzed synthesis of 2-arylindole derivatives via intermolecular C–H annulation of arylhydrazines with sulfoxonium ylides was accomplished. A variety of 2-acetyl-1-arylhydrazines with sulfoxonium ylides were converted into 2-arylindoles in satisfactory yields. Excellent selectivity and good functional group tolerance of this transformation were also observed.
通过芳基肼与锍叶立德的分子间 C-H 环化,实现了Rh( III ) 催化的 2-芳基吲哚衍生物的有效合成。各种具有锍叶立德的 2-乙酰基-1-芳基肼以令人满意的收率转化为 2-芳基吲哚。还观察到这种转化的优异选择性和良好的官能团耐受性。
Rh(<scp>iii</scp>)-catalyzed synthesis of 1-aminoindole derivatives from 2-acetyl-1-arylhydrazines and diazo compounds in water
作者:Yujie Liang、Ke Yu、Bin Li、Shansheng Xu、Haibin Song、Baiquan Wang
DOI:10.1039/c4cc01520g
日期:——
A novel and direct approach to synthesize 1-aminoindole derivatives by Rh(iii)-catalyzed cyclization of 2-acetyl-1-arylhydrazines with diazo compounds via aryl C-H activation has been developed. This intermolecular annulation involving tandem C-H activation, cyclization and condensation steps proceeds efficiently in water, obviates the need of external oxidants, and displays a broad substituent scope