abstract |
PROCEDURE FOR THE PREPARATION OF DERIVATIVES OF 3,7-DIOXO-AZABICYCLE (3,2,0) HEPTANE. IT CONSISTS OF SUBMITTING A CLOSURE OF RINGS TO A COMPOUND OF GENERAL FORMULA (II), PREFERENTIALLY IN THE PRESENCE OF A SODIUM SALT. A COMPOUND (I) IS OBTAINED IN WHICH AND E AND REPRESENT A SEPARABLE CARBONY PROTECTION GROUP, PREFERABLY A CETAL GROUP OR A THIOANALOGUE OF THE SAME. |