Reaction of Resorcinol with Mesityl Oxide: Synthesis of 2,2-Dimethyl-4-formyl- 7-methoxy-(2<b><i>H</i></b>)-1-benzopyran
作者:A. K. Tripathi、K. R. Khan、S. C. Taneja
DOI:10.1081/scc-120015811
日期:2003.1.4
Abstract Synthesis of 2,2-dimethyl-4-formyl-7-methoxy-(2H)-1-benzopyran has been achieved by a three step reaction sequence, wherein the key step has been the preparation of 7-hydroxy-2,2,4-trimethyl-(2H)-1-benzopyran by a novel condensation reaction between resorcinol and mesityl oxide in presence of polyphosphoric acid (PPA). #R.R.L. (Jammu) communication no. 2348
Tricyclic androgen receptor modulator compounds and methods
申请人:Ligand Pharmaceuticals Incorporated
公开号:US20020183346A1
公开(公告)日:2002-12-05
This invention relates to non-steroidal tricyclic compounds that are modulators of androgen receptors and to methods for making and using such compounds.
Polyalkylhydroxychromene and process for preparing the same
申请人:Mitsui Petrochemical Industries, Ltd.
公开号:US04323505A1
公开(公告)日:1982-04-06
A compound of the formula (I) ##STR1## wherein R.sup.1 and R.sup.5 each represents an alkyl group having 1 to 3 carbon atoms; R.sup.2, R.sup.3 and R.sup.4 each represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms and wherein the bonding at the 2-3 position is a single bond and that at the 3-4 position is a double when the substitution of hydroxy group is at the 5-position or the bonding at the 2-3 position is a double bond and that at the 3-4 position is a single bond when the substitution of hydroxy group is at the 7-position; with the proviso that R.sup.2 and R.sup.4 should not be a hydrogen atom or an alkyl group simultaneously and process for preparing same are disclosed. The compound is useful as a herbicide and fungicide and as an intermediate for preparing agricultural chemicals, etc.
Etherified 2-hydroxy-ethyl-phosphonic acid derivatives and plant growth
申请人:Nitrok/e/ mia Ipartelepek
公开号:US04668274A1
公开(公告)日:1987-05-26
The present invention refers to new etherified hydroxy-alkyl phosphonic acid derivatives of the general formula (I) ##STR1## wherein R stands for 2,3-dihydro-2,2-dimethyl-benzofuran-7-yl, 4-methyl-coumarin-7-yl, 2,2,4-trimethyl-(2H)-chromen-5-yl or 2,2,4-trimethyl-(2H)-chromen-7,yl, R.sup.1 and R.sup.2 are the same or different and stand for hydrogen, C.sub.1-8 alkyl, C.sub.1-4 halogen-alkyl, C.sub.1-4 alkoxy-C.sub.1-2 alkyl, Me stands for a monovalent cation. The new compounds can be used as active ingredients of plant growth regulating agents.
Novel Heteroarotinoids as Potential Antagonists of <i>Mycobacterium</i> <i>b</i><i>ovis</i> BCG
作者:Chad W. Brown、Shengquan Liu、Jozef Klucik、K. Darrell Berlin、Patrick J. Brennan、Devinder Kaur、Doris M. Benbrook
DOI:10.1021/jm0303453
日期:2004.2.1
A series of 15 heteroarotinoids has been prepared and evaluated for activity against Mycobacterium bovis BCG with the thiourea-containing isoxyl (7) (0.5 mug/mL) as the standard. 2,2,4-Trimethyl-2H-chromen-7-yl 4-(methoxycarbonyl)benzoate (8) displayed the most significant activity (2.0-4.0 mug/mL) in terms of the lowest concentration (mug/mL) (MIC, minimum inhibitory concentration) required to produce a 99% reduction in the number of colonies on a plate as compared to that system free of the agent at the same dilution of the culture suspension. Ethyl 4-[N-(2,2,4,4-tetramethylchroman-6-yl)thiocarbamoyl] amino}benzoate (9) and [(1E,3Z,5E)-1-aza-4-methyl-6-(1,2,2,4-tetramethyl(1,2-dihydroquinolyl))hexa-1,3,5-trienyl]-amino}aminomethane-1-thione (10) exhibited activity at 5.0-10.0 and 10.0-20.0 mug/mL, respectively, while the other examples had MIC values of 20 mug/mL or greater. The inhibitory ability of 8 may occur via the inhibition of mycolic acid synthesis in a like manner as found with 7, but this requires further study. The heteroarotinoids are the first examples to exhibit inhibitory ability against the growth of Mycobacterium bovis BCB.