Indole-β-nucleophilic substitution. Part 9 nitrogen nucleophiles. Syntheses of hydroxycryptolepine, cryptolepine, and quindoline
作者:Melanie M. Cooper、James M. Lovell、John A. Joule
DOI:10.1016/0040-4039(96)00818-0
日期:1996.6
The alkaloids hydroxycryptolepine, cryptolepine and quindoline have been synthesised utilising the intramolecular β-nucleophilic substitution of a 1-phenylsulfonyl-2-acylindole.
利用1-苯基磺酰基-2-酰基吲哚的分子内β-亲核取代合成了生物碱羟基隐油平,隐油平和喹啉。
Direct N-Alkylation and Kemp Elimination Reactions of 1-Sulfonyl-1<i>H</i>
-Indazoles
作者:Meng Tang、Bingjie Chu、Xiaowei Chang
DOI:10.1002/asia.201800741
日期:2018.8.16
The reactions of 1‐sulfonyl‐1H‐indazoles under basic conditions are discussed, and the direct N‐alkylation and Kemp elimination reactions of these compounds are reported. A series of 2‐(p‐tosylamino)benzonitriles and N‐alkyl indazoles were prepared in good yields. Moreover, the 2‐(p‐tosylamino)benzonitriles could be transformed into a diverse range of important derivatives in a one‐pot reaction. This
[EN] ALKALOID COMPOUNDS EXTRACTED FROM CRYPTOLEPIS SANQUINOLENTA AND USES THEREOF<br/>[FR] COMPOSES ALCALOIDES EXTRAITS DE LA CRYPTOLEPIS SANQUINOLENTA ET LEURS UTILISATIONS
申请人:HEALTHSEARCH, INC.
公开号:WO1994018203A1
公开(公告)日:1994-08-18
(EN) Novel antimalarial compounds, antimalarial compositions containing at least one of the novel compounds as active ingredient and a method for treating falciparum malaria are described. The antimalarial compounds are derived from extracts of the West African plant, $i(Cryptolepis sanquinolenta).(FR) L'invention porte sur de nouveaux composés antimalariques, ainsi que des nouvelles compositions antimalariques contenant au moins un des nouveaux composés utilisé comme ingrédient actif, ainsi que sur un procédé de traitement de paludisme à falciparum. Lesdits composés antipaludéens sont dérivés d'extraits de la plante d'Afrique occidentale appelée $i(Cryptolepis sanquinolenta).
Isolation and Unambiguous Synthesis of Cryptolepinone: An Oxidation Artifact of Cryptolepine
作者:Diana M. Fort、Joane Litvak、Jian Lu Chen、Qing Lu、Puay-Wah Phuan、Raymond Cooper、Donald E. Bierer
DOI:10.1021/np980265f
日期:1998.12.1
Cryptolepinone (3) was isolated as an artifact of extraction from Cryptolepis sanguinolenta. Previously, this compound had been identified as the natural products hydroxycryptolepine (2) and 3. Synthesis via an unambiguous pathway has confirmed the structure of cryptolepinone. Spectroscopic studies in various solvents have shown that the natural product artifact or its synthetic equivalent can exist in the