反应详情

<2> The reaction described in <3> of Synthesis Example 1 was performed under the same conditions, except that the 1-naphthoyloxymethyl difluoromethanesulfonic acid sodium salt (2.61 g) produced in <1> of Synthesis Example 7 above was used instead of the benzoyloxymethyldifluorosulfonic acid sodium salt in the reaction with diphenylmethylphenylsulfonium trifluoromethanesulfonate salt, and thus 3.92 g (yield 94.45%) of 1-naphthoic acid 2,2-difluoro-2-sulfoethyl ester diphenylmethylphenylsulfonium salt as shown in the following reaction scheme 15 was obtained. The structure of the product was confirmed by 1H-NMR (see FIG. 14).

1. custom<2> The reaction described in <3> of Synthesis Example 1
2. customproduced in <1> of Synthesis Example 7