Iodine-catalyzed aromatization of tetrahydrocarbazoles and its utility in the synthesis of glycozoline and murrayafoline A: a combined experimental and computational investigation
A new protocol for the aromatization of tetrahydrocarbazoles has been achieved using a catalytic amount of iodine. The role of iodine has been explained by DFT, and its scope is extended to the total synthesis of glycozoline and murrayafoline A.
[EN] METHOD FOR PREPARING AN OPTICALLY ACTIVE FROVATRIPTAN<br/>[FR] PROCÉDÉ DE PRÉPARATION DE FROVATRIPAN OPTIQUEMENT ACTIF
申请人:NATCO PHARMA LTD
公开号:WO2010073253A1
公开(公告)日:2010-07-01
Disclosed Process for the preparation of optically active Frovatriptan or a salt comprising of : (i) Combining the racemic 6-cyano-3-N-methylamino- 1,2,3,4- tetrahydrocarbazole of formula (I) with D-Pyroglutamic acid as the resolving agent in a Resolution solvent and crystallizing from the said mixture the diastereomeric salt of compound of formula (II) with optically pure D- Pyroglutamic acid; (ii) Separation of desired (+)-6-cyano-3-N-methylamino-l,2,3,4- tetrahydrocarbazole of the formula (III) from the diastereomeric salt (II) using simple filtration technique; (iii) Hydrolyzing compound of formula (III) with phosphoric acid to get R-(+)-6-carboxamido-3-N-methylamino-l,253,4-tetrahydrocarbazole (frovatriptan) of the formula (IV).
One-pot tandem synthesis of carbazole-1,4-quinone from Fischer-Borsche ring using molecular iodine/periodic acid
作者:Mahavir S. Naykode、Priyanka M. Lagad、Monica H. Ghom、Pradeep D. Lokhande、Vivek T. Humne
DOI:10.1016/j.tet.2023.133413
日期:2023.5
TETRAHYDROCARBAZOLE DERIVATIVES USEFUL AS ANDROGEN RECEPTOR MODULATORS (SARM)
申请人:ELI LILLY AND COMPANY
公开号:EP1902026B1
公开(公告)日:2010-02-17
Copper(II) catalyzed aromatization of tetrahydrocarbazole: An unprecedented protocol and its utility towards the synthesis of carbazole alkaloids
作者:Bhakti A. Dalvi、Pradeep D. Lokhande
DOI:10.1016/j.tetlet.2018.01.061
日期:2018.5
protocol for the aromatization of tetrahydrocarbazole is described by using catalytic copper(II) chloride dihydrate in DMSO. This newly established methodology has utilized towards the synthesis of naturally occurring carbazole alkaloids, namely 3-methylcarbazole, 3-formyl carbazole, glycozoline, glycozolicine and clauszoline-K. In addition, the protocol is generalized for the aromatization of N-substituted