61871-82-7Relevant articles and documents
Synergistic Cooperative Effect of Sodium borohydride-Iodine Towards Cascade C?N and C?S/Se Bond Formation: One-pot Regioselective Synthesis of 3-Sulfenyl/selenyl Indoles and Mechanistic Insight
Lavekar, Aditya G.,Equbal, Danish,Saima,Sinha, Arun K.
supporting information, p. 180 - 185 (2018/01/12)
In this work, a new strategy to synthesize 3-sulfenyl/selenyl indole is reported wherein LC?MS reveals a novel insight into synergistic cooperative effect of NaBH4-I2 which allows cascade C?N and C?S/C?Se bond formations via reduction-nucleophilic cyclization-chalcogenylation, three steps in one-pot, towards regioselective synthesis of diverse 3-chalcogenyl indoles including 5-bromo-3-[(3,4,5-trimethoxyphenyl)thio]-1H-indole, a known lead anticancer compound, directly from 2-amino-phenacylchlorides and thiophenols or disulfides/diselenides in aqueous dioxane under transition-metal-free condition. (Figure presented.).
Derivatives of kynurenine as inhibitors of rat brain kynurenine aminotransferase
Varasi,Della Torre,Heidempergher,Pevarello,Speciale,Guidetti,Wells,Schwarcz
, p. 11 - 21 (2007/10/03)
The structural requirements of the catalytic site of kynurenine aminotransferase (KAT), the enzyme responsible for the conversion of L-kynurenine (KYN) to kynurenic acid (KYNA), were examined using analogs and derivatives of KYN. KYNA production from KYN was monitored in rat brain homogenates and brain tissue slices. Modification of KYN's acylalanine side chain or its ring amino group resulted in compounds which did not substantially affect KYNA synthesis. Ring chlorination in positions 3, 4, 5 and 6 yielded KYN analogs which interfered with KYNA production. L-5-Cl-KYN was the most active of the chlorinated kynurenines, and one of the most potent of several other 5-substituted kynurenines. L-5-Cl-KYN was an excellent substrate of KAT, yielding 6-Cl-KYNA. Finally, in kinetic studies, L-5-Cl-KYN (K(i) = 5.4 μM) was found to have an approximately five times higher affinity to the enzyme than the natural substrate KYN (K(m) = 28 μM).