Iodine(V) Reagents in Organic Synthesis. Part 4. <i>o</i>-Iodoxybenzoic Acid as a Chemospecific Tool for Single Electron Transfer-Based Oxidation Processes
作者:K. C. Nicolaou、T. Montagnon、P. S. Baran、Y.-L. Zhong
DOI:10.1021/ja012127+
日期:2002.3.1
o-Iodoxybenzoic acid (IBX), a readily available hypervalent iodine(V) reagent, was found to be highly effective in carrying out oxidations adjacent to carbonyl functionalities (to form alpha,beta-unsaturated carbonyl compounds) and at benzylic and related carbon centers (to form conjugated aromatic carbonyl systems). Mechanistic investigations led to the conclusion that these new reactions are initiated
A New Method for the One-Step Synthesis of α,β-Unsaturated Carbonyl Systems from Saturated Alcohols and Carbonyl Compounds
作者:K. C. Nicolaou、Y.-L. Zhong、P. S. Baran
DOI:10.1021/ja001825b
日期:2000.8.1
oxidation cascades (entry 5, three oxidations in one pot). A range of small (Scheme 1, and entries 6-8 and 14-16, Table 1) and large (entries 9 -13, Table 1) ring ketones and alcohols are easily and controllably (Scheme 1 and entries 8, 10, and 13, Table 1) oxidized. Substitution at the Rand â-sites (R, entry 14;â, entries 15 and 18) of the carbonyl system does not hinder the reaction, nor does it diminish
METHOD OF PRODUCING POLYMERIZABLE COMPOUND, AND SOLUTION OF POLYMERIZABLE COMPOUND
申请人:ZEON CORPORATION
公开号:US20200283399A1
公开(公告)日:2020-09-10
Disclosed is a method of producing a polymerizable compound that enables production of, in high yield, a polymerizable compound used for producing an optical film or the like. The disclosed method of producing a polymerizable compound comprises reacting a compound represented by formula (I) with a compound represented by formula (II) in an organic solvent in which a base having a pKa from 6.1 to 9.5 is present, so as to obtain a reaction solution containing a polymerizable compound represented by formula (III).
Disclosed are water soluble polymeric reagents comprising the structure POLY-[Y—S—W]
x
, where POLY is a water soluble polymer; Y is a hydrocarbon-based spacer group, x is 1 to 25, and S—W is a thiol, protected thiol, or thiol-reactive derivative. Preferably, the water soluble polymer is a PEG polymer. Also disclosed are conjugates of such polymeric reagents with pharmaceutically relevant molecules, and methods of their formation and use.
Provided herein are water-soluble prodrugs. The prodrugs of the invention comprise a water-soluble polymer having three or more arms, at least three of which are covalently attached to an active agent, e.g., a small molecule. The conjugates of the invention provide an optimal balance of polymer size and structure for achieving improved drug loading, since the conjugates of the invention possess three or more active agents releasably attached to a multi-armed water soluble polymer. The prodrugs of the invention are therapeutically effective, and exhibit improved properties in-vivo when compared to unmodified parent drug.