4-methoxy-3,5,7,8-tetramethyl-3,4-dihydrospiro[chromene-2,1'-cyclobutan]-6-ol 在
盐酸 乙酸乙酯 、
正己烷 、 3,5,7,8-tetramethyl-3,4-dihydrospiro[chromene-2,1'-cyclobutane]-4,6-diol 作用下,
以
甲醇 为溶剂,
以to give 7.6 mg of the desired product 3,5,7,8-tetramethyl-3,4-dihydrospiro[chromene-2,1′-cyclobutane]-4,6-diol as a white solid的产率得到3,5,7,8-tetramethylspiro[chromene-2,1'-cyclobutan]-6-ol