Synthesis of C3-Methyl-Substituted Pyrroloindolines and Furoindolines via Cascade Dearomatization of Indole Derivatives with Methyl Iodide
作者:Ji-Cheng Yi、Chuan Liu、Li-Xin Dai、Shu-Li You
DOI:10.1002/asia.201701151
日期:2017.12.5
A highly efficient method for constructing C3‐methyl‐substituted pyrroloindolines and furoindolines via cascade dearomatization reaction of indole derivatives with methyl iodide was developed. This protocol offers a direct approach to a wide range of C3 methyl substituted pyrroloindolines under mild conditions. The utility of this method was further demonstrated in the concise synthesis of (±)‐esermethol
Chemoselective N–H functionalization of indole derivatives <i>via</i> the Reissert-type reaction catalyzed by a chiral phosphoric acid
作者:Yue Cai、Qing Gu、Shu-Li You
DOI:10.1039/c8ob01863d
日期:——
An asymmetric N-alkylation of indole derivatives via the Reissert-type reaction was realized in the presence of a catalytic amount of chiralphosphoricacid. Various enantioenriched indoles with N-1 substituted by 1,2-dihydroisoquinoline could be obtained under mild conditions in good yields and enantioselectivities at room temperature (up to 98% yield, 94% ee). The current method is compatible with
Enantioselective Synthesis of 3a-Amino-Pyrroloindolines by Copper-Catalyzed Direct Asymmetric Dearomative Amination of Tryptamines
作者:Chuan Liu、Ji-Cheng Yi、Zhong-Bo Zheng、Yong Tang、Li-Xin Dai、Shu-Li You
DOI:10.1002/anie.201508570
日期:2016.1.11
A directasymmetricdearomativeamination of tryptamines with O‐(2,4‐dinitrophenyl)hydroxylamine (DPH) was achieved using CuBr‐bisoxazoline complex as a catalyst, affording 3a‐amino‐pyrroloindolines in good to excellent enantioselectivity under mild reaction conditions. Furthermore, the synthetic value of this method was demonstrated in the total synthesis of (−)‐psychotriasine in a highly concise
Sequential Electrophilic Trifluoromethanesulfanylation–Cyclization of Tryptamine Derivatives: Synthesis of C(3)-Trifluoromethanesulfanylated Hexahydropyrrolo[2,3-<i>b</i>]indoles
作者:Yi Yang、Xueliang Jiang、Feng-Ling Qing
DOI:10.1021/jo3013385
日期:2012.9.7
A practical and efficient synthesis of C(3)-trifluoromethanesulfanylated hexahydropyrrolo[2,3-b]indoles 5 from tryptamine derivatives was described. The features of this synthesis included electrophilic activation of C(3) of tryptamine derivatives with “CF3S+” and cascade ring cyclization by carbamate nucleophile attacking at C(2). Surprisingly, when Lewis acid (BF3·OEt2) was used as activator instead
实用和有效的合成C(3)-三氟甲烷磺酰化六氢吡咯并[2,3- b ]吲哚5从色胺衍生物。该合成的特征包括对带有“ CF 3 S + ”的色胺胺衍生物的C(3)进行亲电活化,并通过攻击C(2)的氨基甲酸酯亲核试剂实现级联环环化。出乎意料的是,当使用路易斯酸(BF 3 ·OEt 2)代替质子酸(TsOH·H 2 O)进行色胺胺衍生物的亲电子三氟甲烷磺酰化反应时,未环化产物6是优先组建的。此顺序的三氟甲烷磺酰化-环化方案用于合成几种吡咯烷基吲哚类生物碱类似物。评估了这些三氟甲烷磺酰化生物碱类似物对三种癌细胞系(K562,HeLa,L929)的细胞毒性活性。
Electrophilic Thiocyanation of Tryptamine Derivatives: Divergent Synthesis of SCN‐Containing Indole Compounds
作者:Ai‐Hui Ye、Xu‐Feng Song、Zhi‐Min Chen
DOI:10.1002/asia.202200802
日期:2022.11.2
A tandem dearomative electrophilic thiocyanation/cyclization/acylation of indoles was developed. Interestingly, following replacement of acyl chloride with methanesulfonic acid, 2-SCN tryptamines were obtained using the same starting substrates and reagents.