Phenyl isocyanate → 5'-O-[bis(4-methoxyphenyl)phenylmethyl]-3'-O-phenylcarbamoyl-uridine

Participants

Reaction Steps

The THF solution (1 ml) containing 2,2′-methylenebis[(4S)-4-tert-butyl-2-oxazoline] (0.02 mmol, 5.4 mg) and Cu(OTf)2 (II) (0.02 mmol, 7.2 mg) was stirred for 2 hours at room temperature. After the reaction mixture was cooled to 0° C., the THF solution (1 ml) of 5′-O-[bis(4-methoxyphenyl)phenylmethyl]uridine (0.2 mmol, 109 mg) and the THF solution (1 ml) of phenyl isocyanate (0.2 mmol, 23.8 mg) were added thereto. After the mixture was continuously stirred for 1 hour at 0° C. and overnight at room temperature, the mixture was analyzed with high-performance liquid chromatography. As a result, it was found that 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-phenylcarbamoyl-uridine and 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-phenylcarbamoyl-uridine were produced at the ratio of 65:35, and the transformation ratio of the reaction was 89%.

Provenance & Evidence