Prostaglandin isosteres. 2. Chain-modified thiazolidinone prostaglandin analogs as renal vasodilators
摘要:
Chain modification of a thiazolidinone prostaglandin isostere has led to the production of 4-[3-[3-[2-(1-hydroxycyclohexyl)ethyl]-4-oxo-2-thiazolidinyl]propyl] benzoic acid (5b) which at 1 mg/kg po in the conscious dog causes a 70% increase in renal blood flow over control values with a duration of action exceeding 5 h. Preliminary testing indicates that 5b has a relatively specific action on the vasculature of the kidney. The enantiomers of 5b have been separated and the renal vasodilatory activity has been found to be entirely a property of the R-(+) enantiomer.
Metalated Nitriles: Organolithium, -magnesium, and -copper Exchange of α-Halonitriles
作者:Fraser F. Fleming、Zhiyu Zhang、Wang Liu、Paul Knochel
DOI:10.1021/jo047877r
日期:2005.3.1
dimethylcuprate reagents generating reactive, metalated nitriles. The rapid halogen−metal exchange with alkyllithium and Grignard reagents allows selective exchange in the presence of reactive carbonyl electrophiles, including aldehydes, providing a high-yielding alkylation protocol. Lithiated and magnesiated nitriles react with propargyl bromide by SN2 displacement whereas organocopper nitriles react
α-卤代腈与烷基锂,有机镁和二甲基cup酸锂试剂反应生成活性的金属化腈。与烷基锂和格氏试剂的快速卤素金属交换可在存在醛的反应性羰基亲电试剂存在下进行选择性交换,从而提供了高产率的烷基化方案。锂化和氧化镁腈通过S N 2置换与炔丙基溴反应,而有机铜腈通过S N 2'置换反应,与C-金属化腈的形成相关。
Catalytic cyanomethylation of carbonyl compounds and imines with highly basic phosphine
作者:Satoru Matsukawa、Eri Kitazaki
DOI:10.1016/j.tetlet.2008.02.155
日期:2008.4
A highly basicphosphine, tris(2,4,6-trimethoxy phenyl)phosphine (TTMPP), catalyzes cyanomethylation using trimethylsilylacetonitrile (TMSCH2CN) to give the corresponding products in good to high yields, with both carbonyl compounds and imines.
Metalated Nitriles: Halogen−Metal Exchange with α-Halonitriles
作者:Fraser F. Fleming、Zhiyu Zhang、Paul Knochel
DOI:10.1021/ol036202s
日期:2004.2.1
[reaction: see text] Alpha-halonitriles react with organometallic reagents in a facile halogen-metal exchange. The halogen-metal exchange is extremely fast with Grignard and alkyllithium reagents, generating metalated nitriles in situ with aldehyde, ketone, acid chloride, and acylcyanide electrophiles. Sequential halogen-metal exchange and methylation of conformationally constrained nitriles is highly
This invention relates to novel interphenylene 9-thia-11-oxo-12-azaprostanoic acid compounds, salts, and derivatives thereof. These compounds are exceptionally potent renal vasodilators and antihypertensives which are active when administered orally but which have a more specific type of biological activity than that of many of the natural prostaglandins and their synthetic analogs or derivatives.