Generation of Oxyphosphonium Ions by Photoredox/Cobaloxime Catalysis for Scalable Amide and Peptide Synthesis in Batch and Continuous‐Flow
作者:Junqi Su、Jia‐Nan Mo、Xiangyang Chen、Alexander Umanzor、Zheng Zhang、Kendall N. Houk、Jiannan Zhao
DOI:10.1002/anie.202112668
日期:2022.1.26
for the synthesis of amides and peptides is reported. Synergistic cooperation between a cobaloxime and a photoredox catalyst removes the elements of H2O through the use of PPh3 as a gentle organic reductant. The deoxygenative method is compatible with gram-scale peptide synthesis and applicable to peptide fragment condensation and SPPS, which may find applications in both organic synthesis and pharmaceutical
报道了一种用于合成酰胺和肽的光催化方法。钴肟和光氧化还原催化剂之间的协同作用通过使用 PPh 3作为温和的有机还原剂去除了 H 2 O 元素。脱氧方法与克级肽合成兼容,适用于肽片段缩合和SPPS,可在有机合成和药物生产中找到应用。
Compositions and methods relating to proliferative diseases
申请人:The Penn State Research Foundation
公开号:US09556101B2
公开(公告)日:2017-01-31
Anti-cancer compositions and methods are described herein. In particular, compositions including one or more of leelamine, a leelamine derivative, abietylamine, an abietylamine derivative, and an abietic acid derivative are described. Methods for treatment of pathological conditions particularly cancer, in a subject using one or more of leelamine, a leelamine derivative, abietylamine, an abietylamine derivative, and an abietic acid derivative are described herein.
Phenacyl group containing amide derivative of dehydroabietylamine exhibiting enhanced cytotoxic activity against PLC and MCF7 cancer cell lines
作者:Muhammad Ayaz Mustufa、Afshan Aslam、Cigdem Ozen、Imran Ali Hashmi、Naim ul Hasan Naqvi、Mehmet Ozturk、Firdous Imran Ali
DOI:10.1007/s00044-017-1859-0
日期:2017.7
New amide derivatives of (+)-dehydroabietylamine, tricyclic abietane diterpene amine, were prepared using Zhongping's protocol. (+)-N-(2-phenyl-acetyl)-dehydroabietylamine derivative (11) demonstrated noticeable growth attenuation of hepatocellular carcinoma cell lines including PLC/PRF/5, SNU475, Hep3B-TR, and Huh7 with IC50 of 7.4 A mu M, 9.8 A mu M, 11.7 A mu M, and 11.8 A mu M, respectively. A breast cancer cell line MCF7 was the most sensitive against amide 11 with lowest IC50 value (4.8 A mu M). Low cell confluence and increase in G2/M phase was recorded after 48 and 72 h of treatment of amide 11 on PLC/PRF/5 cell line. Finally, amide 11 has comparatively sufficient therapeutic role due to addition of N-phenacyl group at C-18. Amide 11 demonstrated as potential candidate for future cancer interference and research.
Syntheses of C-ring modified dehydroabietylamides and their cytotoxic activity
Due to their auspicious pharmacological efficacy as future drug candidates, natural products have been attracting scientific interest for centuries. An interesting field of research concerns the natural product class of terpenes. In this regard, a multitude of studies have already shown their promising biological potential. Therefore, a set of 27 derivatives of the diterpene dehydroabietylamine was synthesized, focusing on C-ring modifications and the derivatization of the amino moiety at C-18. Subsequent screening of the compounds in colorimetric sulforhodamine B-assays revealed an in vitro cytotoxicity especially towards malignant cell line MCF7. Particularly, 12-hydroxy-N-(isonicotinoyl)dehydroabietylamine and N-(4-methoxybenzoyl)dehydroabietylamine showed good cytotoxic activities (EC50 (MCF7) = 4.3 0.2 p,M and EC50 (MCF7) = 4.5 +/- 1.5 mu M, respectively) and significant selectivities (SI = 6.2 and SI = 8.8, respectively) towards malignant cell lines. (C) 2018 Elsevier Masson SAS. All rights reserved.
Synthesis and antitumour activities of a novel class of dehydroabietylamine derivatives
作者:Yong Chen、Zhong-Xiang Lin、Ai-Min Zhou
DOI:10.1080/14786419.2011.648191
日期:2012.12
Structural modification is still a popular and important route in the forest chemical field for finding novel tricyclic diterpenes with more potential bioactivities and broad bioactive spectra. In this study, a series of dehydroabietylamine derivatives containing tricyclic diterpene structures were synthesised through oxidation in the 7th position of ring B and nitrification in the 12th position of ring C using dehydroabietylamine as the starting material. Structures of the synthesised compounds were confirmed by IR, H-1-NMR, C-13-NMR, MS and HRMS. The cytotoxicities of these compounds against PC-3 (human prostate carcinoma cell line) and Hey-1B (human ovarian carcinoma cell line) cells by the MTT assay were investigated. The results showed that the presence of a nitro group at 12th position and a carbonyl group at 7th position resulted in an increase of cytotoxic activity. Our findings present more evidence, showing the relationship between the chemical structure and biological function.