Synthesis by conjugate radical addition of new heterocyclic amino acids with nucleobase side chains
作者:Raymond C.F Jones、Didier J.C Berthelot、James N Iley
DOI:10.1016/s0040-4020(01)00546-4
日期:2001.7
N-(2-iodoethyl) and N-(3-iodopropyl)pyrimidines and purines undergo stereoselective conjugate radical addition with an optically active oxazolidinone acceptor to give syn-adducts that can be converted into aminoacids carrying pyrimidine and purine (nucleobase) side chains.
Synthesis by conjugate radical addition of new heterocyclic amino acids with nucleic acid bases in their side chains
作者:Raymond C. F. Jones、Didier J. C. Berthelot、James N. Iley
DOI:10.1039/b006843h
日期:——
N-(2-Iodoethyl) and N-(3-iodopropyl)pyrimidines and purines undergo stereoselective conjugate radical addition with an optically active oxazolidinone acceptor to give syn-adducts that can be converted into pyrimidine and purine amino acids.
[EN] AGENTS THAT PREVENT OR REPAIR SKIN DAMAGE<br/>[FR] AGENTS PRÉVENANT OU RÉPARANT DES LÉSIONS CUTANÉES
申请人:UNIV MINNESOTA
公开号:WO2013106728A1
公开(公告)日:2013-07-18
The invention provides compounds of formula I: or a salt thereof as described herein. The invention also provides dermatological compositions comprising a compound of formula I or mixtures of one or more compounds of formula I, processes for preparing compounds of formula I, intermediates useful for preparing compounds of formula I and therapeutic methods for protecting skin or DNA from photodamage or repairing photodamaged skin or DNA.
[EN] SUNLESS TANNING COMPOUNDS AND COMPOSITIONS<br/>[FR] COMPOSÉS ET COMPOSITIONS DE BRONZAGE SANS SOLEIL
申请人:UNIV MINNESOTA
公开号:WO2015003095A1
公开(公告)日:2015-01-08
The invention provides sunless tanning compositions comprising a compounds of formula (I): or a salt thereof as described herein as well as methods for tanning mammalian skin by contacting the skin with the compounds of formula (I) or compositions comprising compounds of formula (I).
Hydrogen-Bonded Complexes of Diaminopyridines and Diaminotriazines: Opposite Effect of Acylation on Complex Stabilities
作者:Felix H. Beijer、Rint P. Sijbesma、Jef A. J. M. Vekemans、E. W. Meijer、Huub Kooijman、Anthony L. Spek
DOI:10.1021/jo960612v
日期:1996.1.1
from 890 to ca. 6 M(-)(1). This phenomenon is related to different conformational preferences of these compounds. The amide groups in bis(acylamino)pyridines prefer a trans conformation, with the carbonyl group anti with respect to the ring nitrogen and coplanar with the aromatic ring. The amides of bis(acylamino)triazines, however, reside predominantly in a cisconformation. Repulsive secondary electrostatic