摘要:
A process for preparation of a compound of formula I: wherein: R1 represents CH3 or H; and P represents a protecting group; comprising reacting a compound of formula IV: wherein R1 and P and are defined above and R4 represents triflate or SO2F; in the presence of a catalyst and (R3)3SnCH2OP″, wherein each R3 represents C1-4 lower alkyl, and P″ represents H or a protecting group, to yield the compound of formula I.
摘要:
A process of synthesizing a compound of formula I is described: ##STR1## wherein P and P' independently represent H or a protecting group, R.sub.1 represents H or C.sub.1-4 alkyl, and Hal represents a halogen characterized by reacting a compound of formula 2: ##STR2## with R.sub.2 OH, wherein R.sub.2 is C.sub.1-4 alkyl, C.sub.6-10 aryl or C.sub.5-10 heteroaryl in the presence of an acid catalyst or carbodiimide reagent to produce a compound of formula 3: ##STR3## and reacting a compound of formula 3 in the presence of a base and a haloalkylating agent to produce a compound of formula 1.
摘要:
Novel processes for the preparation of lactam- and lactone-containing macrocyles are provided. In preferred embodiments, rapamycin and demethoxyrapamycin are prepared by a convergent synthesis regime. Intermediates useful in the synthetic processes are also provided.