即使在存在芳族部分的情况下,醇和苯酚也可以被硝酸亚硫酰氯或硝酸亚硫酰有效地硝化。硝酸亚硫酰氯适用于碳水化合物中伯羟基的硝化,而硝酸亚硫酰具有足够的反应性,可以与仲羟基反应。这些试剂允许核糖核苷的5'-,2'5'-和3',5'-OH-基团的高选择性硝化,以高产率产生单保护或双保护的硝基衍生物。碳酸和某些酮的烯醇形式可以用三氟甲磺酰硝酸盐/叔丁醇钾有效地硝化。Lutidine N -oxide(2,6-(CH 3)2 C 5 H 3发现NO)对硝化反应具有显着影响。类似地,亚硫酰氯亚硝酸盐和亚硫酰亚硝酸盐显示出优异的上述底物的亚硝化能力。
[EN] A PHOTOLABILE LINKER FOR THE SOLID-PHASE SYNTHESIS OF HYDRAZIDES AND PYRANOPYRAZOLES<br/>[FR] LIEUR PHOTOLABILE POUR LA SYNTHÈSE EN PHASE SOLIDE D'HYDRAZIDES ET DE PYRANOPYRAZOLES
申请人:UNIV DANMARKS TEKNISKE
公开号:WO2015036481A1
公开(公告)日:2015-03-19
The photolabile hydrazine linker of the present invention is based on the o-nitro-veratryl group, which is capable of releasing hydrazide derivatives upon UV irradiation. The linker allows for a new solid-phase peptide synthesis (SPPS) strategy which is fully orthogonal to the most commonly used protecting groups and chemical methods in SPPS and shows excellent compatibility with peptide composition, notably the 20 naturally occurring α-amino acid residues (even in their side-chain protected form) are accepted in the C-terminal of the peptide hydrazides. Furthermore, the linker unit can be applied to synthesize combinatorial libraries of biological interesting heterocyclic compounds, such as pyranopyrazoles.
A method and apparatus are provided for performing light-directed reactions in spatially addressable channels within a plurality of channels. One aspect of the invention employs photoactivatable reagents in solutions disposed into spatially addressable flow streams to control the parallel synthesis of molecules immobilized within the channels. The reagents may be photoactivated within a subset of channels at the site of immobilized substrate molecules or at a light-addressable site upstream from the substrate molecules. The method and apparatus of the invention find particularly utility in the synthesis of biopolymer arrays, e.g., oligonucleotides, peptides and carbohydrates, and in the combinatorial synthesis of small molecule arrays for drug discovery.
Compounds which are capable of generating acid on photolysis are disclosed, and the uses of these compounds, especially for deprotecting the termini of nucleic acid molecules or peptides during synthesis of arrays. The compounds described herein may be employed in the detritylation of 5′-O-dimethoxytrityl (DMT) protected nucleotides by photolysing the compounds to generate an acid capable of removing the DMT group allowing oligonucleotide arrays to be synthesised using readily available 5′-O-DMT-nucleoside-3′-O-phosphoramidite monomers conventionally used in solid phase nucleic acid synthesis. A method of avoiding the effects of stray light in projection lithography techniques is also disclosed.
The present invention relates to (1) a photosensitive composition for color filter black matrix resists, containing (A) a binder resin having a carboxyl group, (B) a compound having an ethylenically unsaturated bond, (C) a photopolymerizing initiator, (D) a thiol compound having two or more mercapto-group-containing groups in which carbon atoms at the a-position and/or n-position with respect to the mercapto group have a substituent, and (E) an organic solvent, and having high sensitivity and excellent storage stability; and (2) color filterblack blackmatrix resist containing (1) the photosensitive composition for color filter black matrix resists and a black pigment (F).
3-ETHYLIDENEHYDRAZINO SUBSTITUTED HETEROCYCLIC COMPOUNDS AS THROMBOPOIETIN RECEPTOR ACTIVATORS
申请人:Miyaji Katsuaki
公开号:US20090281317A1
公开(公告)日:2009-11-12
A compound represented by the formula (1): wherein A, B, R
1
, L
1
, R
2
, L
2
, L
3
, Y, L
4
, R
3
and X are the same as defined in the description, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.