SYNTHESIS OF O,O-DIPHENYL [SUBSTITUTED (2-SELENOMORPHOLIN-4-YL-ACETYL AMINO)] ALKYL PHOSPHONATES
摘要:
A series of O,O-diphenyl [substituted (2-selenomorpholin-4-yl-acetyl amino)] alkyl phosphonates were synthesized by the reactions of selenomorpholine with O,O-diphenyl 2-chloro- acetylamino alkyl phosphonates. The structures of all new compounds have been confirmed by H-1 NMR, P-31 NMR, IR spectroscopy, Mass spectroscopy and elemental analyses.
Isothiocyanate Strategy for the Synthesis of Quaternary α-Amino Acids Bearing a Spirocyclic Ring System
作者:Sebastian Frankowski、Tadeusz Gajda、Łukasz Albrecht
DOI:10.1002/adsc.201701642
日期:2018.5.2
isothiocyanates derived from α‐substituted α‐aminoacids are useful building blocks in the heteroannulation reactions with electron‐deficient olefins. The developed strategy proceeds in a cascade manner and involves Michael addition followed by a cyclization via nucleophilic addition. Target, spirocyclic heterocycles bearing either a quaternary α‐aminoacidmoiety or α‐aminophosphonate group have been
In order to search for new anti-tumor and anti-viral agents, a series of α-aminophosphonate conjugates of 3-O-β-acetyl ursolic acid were prepared. Their biological activities as cytotoxic and anti-HIVagents were evaluated. The preliminary bioassays indicate that synthesized compounds 7a–j have anti-HIV activity (targeting HIV-1 gp120 and CD4) and no cytotoxicity on HT-29 cells (human colon adenocarcinoma
Mixed carboxylic - carbonic anhydride method in phosphono peptide synthesis
作者:Paweł Kafarski、Barbara Lejczak
DOI:10.1016/s0040-4020(01)89200-0
日期:1989.1
Factors influencing the reaction yields and formation of the side products during coupling of N-carbobenzoxyamino acids with dialkyl or diphenyl aminoalkylphosphonates, by means of mixed anhydride procedure, were evaluated. The recommended procedure, arising from these studies, involves the use of chloroform/ethyl chloroformate/triethylamine system and delicate warming of the reaction mixture during