Реакция #2348078

ord-04885be1627f419c80e8453184954dc0

Уравнение реакции

C/C1=C/C[C@@H](/C(C)=C/c2csc(C)n2)OC(=O)C[C@H](O)C(C)(C)C(=O)[C@H](C)[C@@H](O)[C@@H](C)CCC1
desoxyepothilone B
CC1(C)OO1
dimethyldioxirane
→
C/C(=C\c1csc(C)n1)[C@@H]1C[C@@H]2O[C@]2(C)CCC[C@H](C)[C@H](O)[C@@H](C)C(=O)C(C)(C)[C@@H](O)CC(=O)O1
( 2 )
C/C(=C\c1csc(C)n1)[C@@H]1C[C@@H]2O[C@]2(C)CCC[C@H](C)[C@H](O)[C@@H](C)C(=O)C(C)(C)[C@@H](O)CC(=O)O1
Epothilone B

Реактанты

C/C1=C/C[C@@H](/C(C)=C/c2csc(C)n2)OC(=O)C[C@H](O)C(C)(C)C(=O)[C@H](C)[C@@H](O)[C@@H](C)CCC1
desoxyepothilone B
CC1(C)OO1
dimethyldioxirane

Реагенты

Нет

Растворители

ClCCl
CH2Cl2

Условия реакции

Температура
-50°CELSIUS
Подробные условия
See reaction.notes.procedure_details.

Обработка

  1. 1
    ДругоеThe dimethyldioxirane and solvent were removed by a stream of N2
  2. 2
    ДругоеThe residue was purified by flash column chromatography (hexanes/ethyl acetate, 1:1)

Методика

To a solution of desoxyepothilone B (0.0022 g, 0.0041 mmol) in CH2Cl2 (0.25 mL) at −50° C. was added dimethyldioxirane (0.1 mL, 0.0095 mmol) dropwise. The resulting solution was stirred at −50° C. for 1 h. The dimethyldioxirane and solvent were removed by a stream of N2. The residue was purified by flash column chromatography (hexanes/ethyl acetate, 1:1) gave 0.0015 g (70%) of epothiolone B (2) as a pale yellow oil which was identical with an authentic sample in 1H NMR, IR, mass spectrum, and [α]D.

Источник

DOI: 10.6084/m9.figshare.5104873.v1Патент: USRE041990E1uspto-grants-2010_12