S-2-(2,4-dinitrophenyl)ethyl--cysteine: a new derivative for solid-phase peptide synthesis
摘要:
A new acid stable protecting group for the sulfhydryl function of cysteine is described. The S-2-(2,4-dinitrophenyl)ethyl-L-cysteine derivative is fully compatible with the Boc/Bzl solid-phase peptide synthesis strategy and can be smoothly and quantitatively removed to give the free thiol or a disulfide bridge.
MgI
<sub>2</sub>
‐chemoselective cleavage for removal of amino acid protecting groups: A fresh vision for peptide synthesis
作者:Mathéo Berthet、Jean Martinez、Isabelle Parrot
DOI:10.1002/bip.22908
日期:2017.3
In the field of peptide synthesis, the key to a successful access to synthetic targets lies on a pertinent combination of protectinggroups. Their choice is directed by their selective removal conditions. We present here the behavior of some of the most usedprotectinggroups in peptide chemistry under experimental cleavage conditions, combining MgI2 with MW irradiation, using 2‐Me‐THF as a green solvent
The reliability of the (S)-9-fluorenylmethyl-L-cysteine, a completely HF-stable cysteine derivative, has been tested on a solid phase synthesis of oxytocin.
Solid-Phase Synthesis of Peptidyl Thioacids Employing a 9-Fluorenylmethyl Thioester-Based Linker in Conjunction with Boc Chemistry
作者:David Crich、Kasinath Sana
DOI:10.1021/jo901218g
日期:2009.10.2
A method for the synthesis of peptidyl thioacids is described on the basis of the use of the N-[9-(thiomethyl)-9H-fluoren-2-yl]succinamic acid and cross-linked aminomethyl polystyrene resin. The method employs standard Boc chemistry SPPS techniques in conjunction with 9-fluorenylmethyloxycarbonyl protection of side-chain alcohols and amines and 9-fluorenylmethyl protection of side-chain acids and thiols
Efficient and practical one-pot syntheses of the fluorenylmethyl-based side chain derivatives of glutamic and aspartic acids, lysine, and cysteine are described. Likewise, stability/lability of these derivatives towards solvents and reagents used in solid phase peptide synthesis are discussed.
PREPARATION METHOD FOR ECTEINASCIDIN COMPOUND AND INTERMEDIATE THEREOF
申请人:BRIGHTGENE BIO-MEDICAL TECHNOLOGY CO., LTD.
公开号:US20210355132A1
公开(公告)日:2021-11-18
The present invention provides a method for preparing an ecteinascidin compound and an intermediate thereof, and specifically provides a preparation method for a novel compound QT9, and a method of using QT9 to prepare an ecteinascidin compound. The method provided by the present invention has high reaction selectivity and high yield, the obtained compound is easy to purify, and defects in the prior art that multiple intermediates are oily substances, and the reaction selectivity is poor are solved. The method of the present invention is particularly applicable to industrial production.