Stereoselective Formal Synthesis of Pseudodistomin C
摘要:
[GRAPHICS]Trisubstituted benzenesulfonylmethylpiperidine 4, in which the substituents are all cis to each other, is a direct synthetic precursor of the cytotoxic marine alkaloid pseudodistomin C; it has been synthesized with total diastereoselectivities from (S)-pyroglutaminol.
Synthesis of 5-Amino- and 4-Hydroxy-2-phenylsulfonylmethylpiperidines
摘要:
Suitable protected 5-amino- and 4-hydroxy-2-phenylsulfonylmethylpiperidines were synthesized from functionalized N-benzyloxycarbonylpiperidin-2-ones through the opening of lactam ring by methyl phenyl sulfone carbanion followed by reductive aminocyclization.