Dinaphthyl disulfide

Dimethoxy-l,4-bis(dimethylatnino)butane 2,2 -Dihydroxy-6,6 -dinaphthyl disulfide l-(o-Chlorophenyl)-l-(p-chlorophenyl)-2,2-dichloroethane... 

The reaction of naphtho[l,8-Z)c]thiete S-oxide (35) with lithium aluminum hydride is more complex, and its main product is dinaphthyl disulfide (68, Scheme 12) arising as a result of a series of successive transformations where disproportionation of one... 

The radical mechanism for styrene rubber mechanochemistry was demonstrated by using S-labeled l,T-dinaphthyl disulfide [21]. Good agreement was observed between the extent of degradation measured colorimetrically and by labeling. 

R R)-fi/s(dinaphthyl)-22-crown-6 at low temperature (—78°C) in carbon disulfide solution selectively extracts one molecule of deuteromethanol out of a... 

A mixture of 30 g. (0.16 mole) of a-naphthoyl chloride (p. 209) [Org. Syntheses Coll. Vol. 2, 425 (1943)], 30 g. (0.19 mole) of 8-methylnaphthalene, and 100 g. of carbon disulfide is cooled in an ice bath and 30 g. (0.22 mole) of powdered aluminum chloride is added slowly in small portions. The reaction mixture is stirred for 3 hours while protected from atmospheric moisture with a calcium chloride tube. The carbon disulfide is decanted from the red-brown residue, and the residue is decomposed by the gradual addition of ice and hydrochloric acid. The resulting mixture plus the carbon disulfide layer is steam-distilled to remove unreacted -methylnaphthalene. The aqueous layer is decanted from the residue in the steam distillation vessel, and the residue is treated with dilute sodium hydroxide solution. The solid remaining is washed with water and dried. The yield of crude 2-methyl-l,T-dinaphthyl ketone is 90%. Pure ketone, m.p. 140-141°, may be obtained by several recrystallizations from ethanol including activated carbon treatment. 

Naphthalene. Early studies showed that the action of slightly less than one equivalent of chlorosulfonic acid on a 10% solution of naphthalene 40 in carbon disulfide gives the 1-sulfonic acid and a little of the 1,5-disulfonic acid, but none of the 2-sulfonic acid was isolated. Naphthalene has also been reacted with chlorosulfonic acid in nitrobenzene and in nitrotoluene at 20-35 °C. With an equimolar quantity of the reagent, a mixture of the mono-sulfonic acids and dinaphthyl sulfones was formed at 6°C, the 1,1-sulfone predominated, but at 170 °C, the 2,2 -isomer was the major product. The reaction has also been extensively studied at low temperatures (—35 to 0 °C). ... 

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