2 PhSH NaH It CH, I 7, PhS, CH, a Number in parentheses represents yield of recrystallized product. of 2 equivalent to a carbocationic center. Simultaneously, an anionic center is created at C (1) for further elaboration. The pioneering work of Danishefsky on developing 1, l-dicarboalkoxycyclopropanes takes advantage of the carbocationic character of Z5 but does not provide facile manipulation of the anionic enter since removal of the carboalkoxy ...