One-Pot Synthesis of 5-Hydroxy-4<i>H</i>-1,3-thiazin-4-ones: Structure Revision, Synthesis, and NMR Shift Dependence of Thiasporine A
作者:Tobias Seitz、Peng Fu、Franz-Lucas Haut、Lutz Adam、Marija Habicht、Dieter Lentz、John B. MacMillan、Mathias Christmann
DOI:10.1021/acs.orglett.6b01166
日期:2016.7.1
arylthioamides with 3-bromopyruvic acid chloride to 5-hydroxy-4H-1,3-thiazin-4-ones has been developed. The initial condensation affords two regioisomeric thiazolinone intermediates in a temperature-dependent manner. The synthesis of the 2-aminophenylthiazinone derivative led to the revision of the previously proposed structure of thiasporine A. Synthesis of the revised structure and NMR analysis revealed that
已经开发了将芳基硫酰胺与3-溴丙酮酸酰氯环环化成5-羟基-4 H -1,3-噻嗪-4-酮。初始缩合以温度依赖性方式提供两种区域异构的噻唑啉酮中间体。2-氨基苯基噻嗪酮衍生物的合成导致了先前提出的噻菌素A的结构的修饰。修饰的结构的合成和NMR分析表明,噻菌素A已被分离为羧酸盐。
Anithiactins A–C, Modified 2-Phenylthiazoles from a Mudflat-Derived <i>Streptomyces</i> sp.
作者:Hiyoung Kim、Inho Yang、Rahul S. Patil、Sinwoo Kang、Jihye Lee、Hyukjae Choi、Min-Sun Kim、Sang-Jip Nam、Heonjoong Kang
DOI:10.1021/np500558b
日期:2014.12.26
Intensive investigation of the chemical components of a Streptomyces sp. isolated from mudflat sediments collected on the southern coast of the Korean peninsula led to the isolation of three new compounds, anithiactins A-C (1-3). The chemical structures of anithiactins A and C were determined by interpretation of NMR data analyses, while the chemical structure of anithiactin B was established from a combination of NMR spectroscopic and crystallographic data analyses. The structure of anithiactin A was also confirmed by total synthesis. These three anithiactins displayed moderate acetylcholinesterase inhibitory activity with no significant cytotoxicity.