Pseudodistomins A and B, novel antineoplastic piperdine alkaloids with calmodulin antagonistic activity from the Okinawan tunicate Pseudodistoma kanoko
Photocyclisation of enamides. Part 39. General strategy for the synthesis of pseudodistomins: synthesis of triacetates of (±)-tetrahydropseudodistomin and proposed structures of pseudodistomins A and B
synthetic strategy of pseudodistomin was developed by first synthesizing the (±)-(2a,4β,5β)-5-amino-2(3-hydroxypropyl)piperidin-4-o1 14 as a key intermediate via a route involving the reductive photocyclisation of enamide 5 followed by the introduction of a three-carbon side-chain by application of an α-acylamino photo-induced radical allylation by allyltributyltin replacing a methylsulfanyl group. The key
Pseudodistomins A and B, novel antineoplastic piperdine alkaloids with calmodulin antagonistic activity from the Okinawan tunicate Pseudodistoma kanoko