Gorst-Allman, Charles P. published the artcileSynthetic approaches to the austocystins, mycotoxins from Aspergillus ustus. Part I, Name: 3-Chloro-2,6-dimethoxybenzoic acid, the publication is South African Journal of Chemistry (1978), 31(4), 143-8, database is CAplus.
Two approaches to the synthesis of ustocystin A (I) were investigated. 2,6-(MeO)2C6H3CO2H was converted into the 3-Cl derivative (II) by chlorination with SO2Cl2. The acid chloride of II was treated with 2,4,6-(MeO)3C6H2Li to give III (R = Me), which was selectively demethylated to give III (R = H; IV). Alk. condensation of IV gave 2 xanthoses V [R = H, R1 = Cl; R = Cl, R1 = H (VI)] in a 12:1 ratio. VI was the desired xanthone for I preparation The focal point of the second approach was the use of a 4-methylcoumarin as a masked dehydrofurobenzofuran. VII was necessary for this approach but its isomer VIII (R = Me) was obtained. The x-ray structure of VIII (R = H) was determined
South African Journal of Chemistry published new progress about 36335-47-4. 36335-47-4 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Ether, name is 3-Chloro-2,6-dimethoxybenzoic acid, and the molecular formula is C9H9ClO4, Name: 3-Chloro-2,6-dimethoxybenzoic acid.
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