629652-40-0

Usage

Uses

An intermediate in the preparation of cis-Tadalafil (T004520). A PDE5 inhibitor.

Upstream product

• 79-04-9 chloroacetyl chloride 
• 1039484-71-3 (3R)-1-(3,4-methylenedioxyphenyl)-2,3,4,9-tetrahidro-9H-pyrido[3,4-b]indole-3-carboxylic acid methyl ester 

Downstream Products

• 1018814-78-2 (6S,12aR)-6-(benzo[d][1,3]dioxol-5-yl)-2-((R)-1-benzylpyrrolidin-3-yl)-2,3,6,7,12,12a-hexahydropyrazino[1′,2′:1,6]pyrido[3,4-b]indole-1,4-dione 
• 531500-48-8 11-benzo[1,3]dioxol-5-yl-3-methyl-2,3,4a,11-tetrahydro-10H-3,10,11a-triaza-benzo[b]fluorene-1,4,5-trione 
• 531500-48-8 11-benzo[1,3]dioxol-5-yl-3-methyl-2,3,4a,11-tetrahydro-10H-3,10,11a-triaza-benzo[b]fluorene-1,4,5-trione 
• 629652-72-8 (6R,12aR)-6-(1,3-benzodioxol-5-yl)-2-methyl-2,3,6,7,12,12a-hexahydropyrazino[1′,2’:1,6]-pyrido[3,4-b]indole-1,4-dione 
• 171596-28-4 (6S,12aR)-6-(benzo[d][1,3]dioxol-5-yl)-2-methyl-2,3,12,12a tetrahydropyrazino [1',2':1,6] pyrido[3,4b] indole1,4(6H,7H)-dione 

Relevant academic research and scientific papers

Synthesis and evaluation of human phosphodiesterases (PDE) 5 inhibitor analogs as trypanosomal PDE inhibitors. Part 2. Tadalafil analogs

In this Letter we describe our ongoing target repurposing efforts focused on discovery of inhibitors of the essential trypanosomal phosphodiesterase TbrPDEB1. This enzyme has been implicated in virulence of Trypanosoma brucei, the causative agent of human African trypanosomiasis (HAT). We outline the synthesis and biological evaluation of analogs of tadalafil, a human PDE5 inhibitor currently utilized for treatment of erectile dysfunction, and report that these analogs are weak inhibitors of TbrPDEB1.

Two Concise syntheses of cialis via the N-acyliminium pictet-spengler reaction

The imine derived from piperonal and D-tryptophan methyl ester underwent N-acyliminium Pictet-Spengler reaction with either Fmoc-sarcosyl chloride or chloroacetyl chloride. The products were readily converted to the drug Cialis.