Syntheses of 2-Substituted 6/7-Methoxy-l,4-benzodioxan-7/6-carbaldehydes
نویسندگان
چکیده
منابع مشابه
NITROIMIDAZOLES XI1 [I]: SYNTHESES OF TRISUBSTITUTED PYRAZOLES AND SUBSTITUTED (1 -METHYL-5-NITRO-2- IMIDAZOLYL) PYRIMIDINONES
The reaction of P-diketones 1 with phenyl hydrazine afforded 5-aryl-3-(1- methyl-5-nitro-2-imidazoly1)-1-phenylpyrazole (2) and 3-aryl-5-(1-methyl-5- nitro-2-imidazoly1) -1-phenylpyrazole (3). The reaction of diketones (1) with urea in the presence of p-toluenesulfonic acid gave 4-(or 6-)aryl-6-(or 4-)(1-methyl- 5-nitro-2-imidazolyl)-1-(lH)pyrimidones (4). The structures of all compounds w...
متن کاملSYNTHESES, ANTIFUNGAL AND ANTIBACTERIAL ACTIVITIES OF SUBSTITUTED 1,2, CTRIMOLES
The reaction of readily available 1 -methyl-4-nitropyrrole-2- carboxylic acid (1) with thionyl chloride afforded the corresponding acyl chloride 2. The reaction of compound 2 with thiosemicarbazides yielded 1-(1 -methyl-4-nitrop yrrole-2-carbony1)- thiosemicarbazides (3) which cyclized in basic medium to 5-(1-methyl-4-nitropyrrole- 2-y1)-2,4-dihydro-3H- l,2,4-triazole-3- thione 4. Alkylatio...
متن کاملSynthesis of Substituted 3-(/J,ß-Dimethylhydrazino)- 2-methoxy-2-oxo-l,2-oxaphospholanes
Cyclisation of d-(N.N-dimethylhydrazono)alkyl phosphites af forded the title compounds in modera te to high yields. The ring closure was highly diastereoselective leading to an excess of the diastereomers with the /3,/3-dimethylhydrazino and M e O P groups in the trans configuration. The structure and relative configurations of diastereomeric pairs were established by ' H and C N M R spectrosco...
متن کاملSyntheses of highly functionalised 6-substituted pteridines.
Methods for the synthesis of polyfunctional 6-substituted pteridines from the corresponding 6-aldehydes are described. Alkene, ester, ketone, amide, cyano, oxime, bromo, methoxy and dihydroxy functional groups have all been introduced principally through improved methodologies for Wittig reactions using 2-thioalkyl-6-formylpteridines as substrates. Further modification of the alkenes derived fr...
متن کاملMethoxy-substituted centrohexaindanes through the fenestrane route.
Tetrahydroxyfenestrindane undergoes HPF6-catalyzed condensation with anisole, 2-methylanisole and the three dimethoxybenzenes to furnish several centrohexaindanes bearing oxyfunctionalization at the opposite ends of one of the three [2,2']-spirobiindane axes.
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ژورنال
عنوان ژورنال: Bioscience, Biotechnology, and Biochemistry
سال: 1992
ISSN: 0916-8451,1347-6947
DOI: 10.1271/bbb.56.630