Controlled isoprene polymerization mediated by iminopyridine-iron (II) acetylacetonate pre-catalysts
作者:Mengmeng Zhao、Liang Wang、Qaiser Mahmood、Chuyang Jing、Guangqian Zhu、Xianhui Zhang、Xiaowu Wang、Qinggang Wang
DOI:10.1002/aoc.4836
日期:2019.4
A ligand controlled stereoselective polymerization of isoprene has been developed. A series of (aryl/alkyl)‐iminopyridine iron (II) acetylacetonate complexes: (aryl = Ph Fe1; alkyl = CH2Ph Fe2, CH (Ph)2 Fe3, CH (Me)2 Fe4, C (Me)3 Fe5, C (Me)2CH2C(Me)3 Fe6), has been prepared in which steric and electronic substituents systematically modified to investigate their influences for isoprene polymerization
1-AMINOPHOSPHONIC ACIDS AND ESTERS BEARING HETEROCYCLIC MOIETY. PART 2.<sup>1</sup> PYRIDINE, PYRROLE AND IMIDAZOLE DERIVATIVES
作者:Bogdan Boduszek
DOI:10.1080/10426509608046390
日期:1996.6.1
aminophosphonates derivedfrom pyridine, pyrrole and imidazole. The Schiff bases obtained from corresponding heterocyclic aldehydes and benzylic amines were caused to react with diphenyl phosphonate or dibenzyl phosphonate to form corresponding heterocyclic aminophosphonates in good yields. The N-(benzylamino)-phosphonates were deblocked by catalytic hydrogenolysis. The benzhydryl group from the phosphonates
Paclitaxel Biosynthesis: Adenylation and Thiolation Domains of an NRPS TycA PheAT Module Produce Various Arylisoserine CoA Thioesters
作者:Ruth Muchiri、Kevin D. Walker
DOI:10.1021/acs.biochem.6b01188
日期:2017.3.14
Structure–activity relationship studies show that the phenylisoserinyl moiety of paclitaxel (Taxol) is largely necessary for the effective anticancer activity. Several paclitaxel analogues with a variant isoserinyl side chain have improved pharmaceutical properties versus those of the parent drug. To produce the isoserinyl CoAs as intermediates needed for enzyme catalysis on a semibiosynthetic pathway
Zinc Catalyzed Hydroboration of Esters and Nitriles with Pinacolborane
作者:Gobbilla Sai Kumar、Ravi Kumar、Abhijit Sau、Vadapalli Chandrasekhar、Tarun K. Panda
DOI:10.1021/acs.joc.3c01306
日期:2023.9.1
bench-stable iminopyridine-ligated zinc complex for the effective catalytic hydroboration of esters and nitriles under solvent-free conditions. Various esters and nitriles bearing different functionalities were selectively reduced to form corresponding alcohols and amines in good yields. Detailed Hammett plots are provided to explain the electronic effects on the phenyl ring.