configuration at C-1′ emerged from syntheses of the militarinone B candidates 1′′S- and 1′′R-(5S,8′R,10′R)-3 from the building blocks 9, 11, 14, and 15a while introducing TMB as a more acid-labile N-protecting group for β-ketoamides than DMB. Comparisons of 1′′S- and 1′′R-(5S,8′R,10′R)-3 with natural militarinone B (3; reisolated from Nature) revealed identity versus distinctness.
军用拟
青霉素B ( 3 )的 5 S、8' R和 10' R构型应与其
生物合成前体军用功 C 中的构型相同。 C-1' 处的构型来自合成所述militarinone乙候选1''的小号' -和1' - [R - (5小号,8' - [R,10' - [R )- 3从积木9,11,14,和图15A,同时引入
TMB作为更酸不稳定氮- β-酮酰胺的保护基团而不是
DMB。1'' S - 和 1'' R -(5 S ,8' R ,10' R )- 3与天然 militarinone B ( 3 ; 从 Nature 重新分离) 的比较揭示了同一性与独特性。