Condensed Heteroaromatic Ring Systems; XVII:<sup>1</sup>Palladium-Catalyzed Cyclization of β-(2-Halophenyl)amino Substituted α,β-Unsaturated Ketones and Esters to 2,3-Disubstituted Indoles
Palladium-catalyzed cyclization of β-(2-halophenyl)amino substituted α,β-unsaturated ketones and esters, prepared from 2-haloanilines by three different methods, gave 2,3-disubstituted indoles.
Photochemistry of ortho-Azidocinnamoyl Derivatives: Facile and Modular Synthesis of 2-Acylated Indoles and 2-Substituted Quinolines under Solvent Control
The light-promoted potential of ortho -azidocinnamoyl compounds is evaluated for heterocycle synthesis. Depending on the nature of the solvent, 2-acylated indoles were obtained under aprotic conditions, whereas the use of a protic medium led to 2-substituted quinolines. The synthetic significance of this metal-free method is that, by simply changing the solvent, the reaction outcome can be directed
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。
Fused pyrrole derivatives
申请人:Banner David
公开号:US20070142452A1
公开(公告)日:2007-06-21
The invention is concerned with novel fused pyrrole derivatives of formula (I)
wherein A, Ar, R
1
, R
2
, R
2′
and R
2″
and n are as defined in the description and in the claims, as well as physiologically acceptable salts thereof. These compounds inhibit chymase and can be used as medicaments.