Cinnamaldehyde, thiosemicarbazone → HCID 2772307, compound

A mixture of 70.0 g (0.35 m) of cinnamaldehyde thiosemicarbazone and 56.0 g (1.16 m) of ferric ammonium sulfate dodecahydrate was pulverized with a mortar and pestle and added portionwise to 1400 ml of hot water. The mixture was stirred at 60°-100° C. for 11/4 hr., during which time the color of the mixture changed from yellow-orange to dark red and much of the solid material went into solution. The mixture was filtered hot to yield 54.5 g of a brown granular product. The mother liquors were cooled under refrigeration and refiltered to give another 12.3 g of product. The crude product was pulverized and triturated twice with chloroform to remove the residual starting material and the dark brown impurities from the product, leaving 27.4 g of a beige microcrystalline powder. An additional 4.60 g of product was recovered by concentrating the chloroform filtrate. Total yield was 32.0 g (0.16 m), mp. 212°-214° C. (dec.). This procedure is novel and is of general utility for preparing these types of compounds. The novel procedure for this particular product is defined as:

1. filtrationThe mixture was filtered hot

ORD record

ord-734646e032d74a9e87d9e3fd162b3c1a

Source dataset

uspto-grants-1981_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04273926