Photochemical Studies On 2-hydroxy - And 2-methoxy-1.4- Naphthoquinone

Photolysis of a dilute chloroform solution of 2-hydroxyrn1.4 naphthoquinone with diffuse day light yielded 2-chloro-3-rnhydroxy-1,4-naphthoquinone (SB) and an unidentified compoundrn(SA). Compound 58 was characterized by spectroscopicrnmethods. Its photoformation from the materials used in thernpresent study is unprecedented.rnThe photochemical reaction of 2-hydroxy-1.4-naphthoquinonernis carbon tetrachloride failed to yield to compoundrnSB. On the other hand. the room temperature reaction ofrnthionyl chloride or phosgene with the hydroxy quinonernafforded a compound Y/hich. by comparative TLC. was identifiedrnas compound SO. The significance of these results isrndiscussed,rnPhotolysis of a dilute chloroform solution ofrn2-methoxy-1.4-naphthoquinone also gave a major reactionrnoroduct (SC) which has not been fully elucidated

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