Efficient and expeditious chemoselective BOC protection of amines in catalyst and solvent-free media
作者:Balaga Viswanadham、Abdul S. Mahomed、Holger B. Friedrich、Sooboo Singh
DOI:10.1007/s11164-016-2702-9
日期:2017.3
A green and eco-friendly route for the almost quantitative BOC protection of a large variety of aliphatic and aromatic amines, amino acids, and amino alcohols is reported in catalyst and solvent-free media under mild reaction conditions. The products were confirmed by 1H, 13C NMR, IR spectroscopy, and in some cases, elemental analysis. This protocol does not require any water quenches, solvent separations
据报道,在温和的反应条件下,在无催化剂和无溶剂的介质中,绿色环保的路线几乎可以定量保护各种脂肪族和芳香族胺,氨基酸和氨基醇的BOC。产物通过1 H,13 C NMR,IR光谱和某些情况下的元素分析确认。该方案不需要任何水淬,溶剂分离和纯化步骤,例如重结晶和柱色谱法。
Phosphorus in organic synthesis—VII
作者:K. Ninomiya、T. Shioiri、S. Yamada
DOI:10.1016/s0040-4020(01)97352-1
日期:1974.1
(DPPA). The reactionprocedure is quite simple, occurring by refluxing an equimolecular mixture of a carboxylic acid, DPPA, and triethylamine in the presence of a hydroxyl component. Aromatic, aliphatic, and heterocyclic carboxylic acids underwent rearrangements in satisfactory yields. As this modified Curtins reaction is much simpler and less laborious than the classical Curtius reaction and proceeds
A rotaxane consisting of a cucurbituril and an uncharged guest molecule, having low or null affinity therebetween is provided as well as processes for providing the same. Various uses as energy converters (“frictionless” molecular motors), biochips and biosensors using the same are also provided.
Novel pseudo[2]rotaxanes constructed by the self-assembly of dibenzyl tetramethylene bis-carbamate derivatives and per-ethylated pillar[5]arene
作者:Shuhan Xiong、Xiaoning Zhang、Lu-Bo Meng、Juli Jiang、Chen Lin、Leyong Wang
DOI:10.1039/c5cc01345c
日期:——
Novel neutral guest molecules, G1-G7, are studied for their host-guest complexation with per-ethylatedpillar[5]arene (EtP[5]A). Among them, G1 and G7 , dibenzyl tetramethylene bis-carbamate derivatives, are found to afford a novel stable pseudo[2]rotaxane with EtP[5]A, respectively, and G7 subset EtP[5]A shows photoresponsive properties.
CROSSLINKED POLYALLYLAMINE OR ACID ADDITION SALT THEREOF, AND USE THEREOF FOR MEDICAL PURPOSES
申请人:Inoue Atsushi
公开号:US20100189679A1
公开(公告)日:2010-07-29
A cross-linked polyallylamine or an acid addition salt thereof has both high phosphate adsorption capability and low degree of swelling, and a medical use thereof. The cross-linked polyallylamine or an acid addition salt thereof is obtained by copolymerization of allylammonium dihydrogen phosphate with an acid addition salt of N,N′-diallyl-1,3-diaminopropane in an amount of 5 to 25 mol % with respect to the amount of the allylammonium dihydrogen phosphate, the cross-linked polyallylamine or an acid addition salt thereof having a phosphate adsorption capacity of 2.7 to 5.0 mmol/g; and a degree of swelling of 2.0 to 5.0. The cross-linked polyallylamine or an acid addition salt thereof is useful as a therapeutic or prophylactic agent for hyperphosphatemia.