Malealdehydic acid

Dichloro-5-isopropoxy-2(5H)-furanone 2(5H)-Furanone. 3,4-dichloro-5-isopropoxy- (8) 2(5H)-Furanone, 3,4-dichloro-5-(1-methylethoxy)- (9) (29814-12-8) Mucochloric acid Malealdehydic acid, dichloro- (8) 2-Butenoic acid, 2,3-dictiloro-4-oxo-, (2)- (9) (87-56-9)... [Pg.211]

SYNS ALDEHYDODICHLOROMALEIC ACID 2-BUTENOIC ACID, 2.3-DICHLOR-4-OXO-, (Z)-(9CI) a-p-DICHLORO-P-FORMYL ACRYLIC ACID Q 3,4-DICHL-ORO-2-HYDROXYCROTONOLACTONE 3,4-DICHD ORO-2-HYDROXYCROTONOLACTONIC ACID DI-CHLOROMALEALDEHYDIC ACID 2,3-DICHLORO-MALEIC ALDEHYDE ACID 2.3-DICHLORO-4-OXO-2-BUTENOIC ACID KYSELINA MUKOCHLOROVA MALEALDEHYDIC ACID, DICHLORO-4-OXO-, (ZH9CI)... [Pg.971]

A new synthesis of verrucarin J uses a PO-olefination reaction of the phos-phonate (181) with malealdehydic acid as a key step to give verrucarin J seco acid (182) which can be cyclized to verrucarin J. The all ( )-triene (183) has been synthesized en route to a total synthesis of compactin. ... [Pg.259]

On treatment of furan at low temperature with hydrogen peroxide the peroxide (53) is obtained which may be partially hydrogenated to malealdehyde. 2,5-DimethyIfuran with acidic hydrogen peroxide yields the hydroperoxide (54) and the cyclic peroxides (55) and (56) mechanisms have been proposed. Ozonolysis of furan at -60 °C in chloroform with reductive work up affords glyoxal and formic acid. Methylfurans behave similarly thus... [Pg.610]

Malealdehyde, H—(i—CHO. Mol. wt. 86.09, yel. oil, b.p. 56-59 /9.5 mm., soluble in acetic acid, acetone, or chloroform sparingly soluble in ether, benzene, carbon tetrachloride polymerizes rapidly yellow solutions in water and methanol become colorless on standing disemicarbazone, needles from water, m.p. 246-247° dec. [Pg.320]

Hydrogenation Copper chromite (Lazier catalyst). Copper chromium oxide (Adkins catalyst). Lindlar catalyst (see also Lithium ethoxyacetylide, Malealdehyde, Nickel boride). Nickel catalysts. Palladium catalysts. Palladium hydroxide on carbon. Perchloric acid (promoter). Platinum catalysts. Raney catalysts, Rhenium catalysts. Rhodium catalysts. Stannous chloride. Tributylborane. Trifluoroicetic acid, Tris (triphenylphosphine)chlororhodium. [Pg.658]

Acid hydrolysis of 2,5-dimethoxy-2,5-dihydrofurane affords malealdehyde together with a small amount of fumaric dialdehyde. ... [Pg.1051]

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