66885-68-5Relevant articles and documents
Iron-catalyzed domino decarboxylation-oxidation of α,β-unsaturated carboxylic acids enabled aldehyde C-H methylation
Gong, Pei-Xue,Xu, Fangning,Cheng, Lu,Gong, Xu,Zhang, Jie,Gu, Wei-Jin,Han, Wei
supporting information, p. 5905 - 5908 (2021/06/18)
A practical and general iron-catalyzed domino decarboxylation-oxidation of α,β-unsaturated carboxylic acids enabling aldehyde C-H methylation for the synthesis of methyl ketones has been developed. This mild, operationally simple method uses ambient air as the sole oxidant and tolerates sensitive functional groups for the late-stage functionalization of complex natural-product-derived and polyfunctionalized molecules.
NOVEL SALTS AND POLYMORPHIC FORMS OF PANOBINOSTAT
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Page/Page column 11, (2018/04/12)
The present invention provides novel crystalline polymorphic form of DL-lactate salt of Panobinostat of Formula-I. This invention also provides process for preparation of crystalline forms of Panobinostat DL-lactate. Further, the present invention relates to a novel pharmaceutically acceptable salts and solid forms of Panobinostat.
Influence of pendent alkyl chains on Heck and Sonogashira C-C coupling catalyzed with palladium(II) complexes of selenated Schiff bases having liquid crystalline properties
Rao, Gyandshwar Kumar,Kumar, Arun,Singh, Mahabir Pratap,Kumar, Ajay,Biradar, Ashok Manikrao,Singh, Ajai K.
, p. 42 - 47 (2014/01/23)
The effect of pendent alkyl chain lengths on Heck and Sonogashira coupling has been investigated for the first time using air and moisture insensitive complexes, [PdLCl] (1-4), of selenated Schiff bases (L = L1-L4), differing in length and number of pendent alkyl chain(s) and behaving as a (Se, N, O -) type of ligand. Differential scanning calorimetric (DSC) and polarized optical microscopic (POM) investigations show liquid crystalline nature of L1 and L2, which have one pendent alkyl chain of size C18 and C10 respectively. The yields of coupled products in catalytic Heck and Sonogashira coupling reactions were found good when amount of 1-4 used for them was 1.0 and 0.5 mol% respectively. The catalytic efficiency decreases with alkyl chain length of pendent arm of ligand for Heck coupling but remains unaffected in case of Sonogashira coupling. The in situ generation of palladium nanoparticles (NPs) protected with organoselenium species occurs in the case of Heck coupling. The length of pendent alkyl chain appears to control the dispersion and composition of these NPs and consequently the catalytic efficiency for Heck coupling. The black residues formed in the case of Sonogashira coupling catalyzed with 1 and 4 were found to have small fraction of NPs and a large proportion of big size aggregates. Their compositions for both the catalysts have been found nearly the same and due to predominance of aggregates, the efficiency remains almost unchanged on varying length of pendent alkyl chain. The two phase test for Heck coupling indicates that catalysis is largely heterogeneous.
