تفاعل #418713

ord-fd1f4dc830004d7aa57337ae0568edcd

معادلة التفاعل

O=C([O-])O.[Na+]
sodium hydrogen carbonate
C[C@@H]1[C@H]2C[C@@H](C[C@H]1B(Cl)[C@@H]1C[C@@H]3C[C@H]([C@H]1C)C3(C)C)C2(C)C
(−)-B-chlorodiisopinocampheylborane
Cc1cccc([C@@H](C)C(=O)/C=C/[C@@H]2[C@H]3CC(=O)O[C@H]3C[C@H]2OC(=O)c2ccccc2)c1
enone{(1S,5R,6R,7R)-6-[(1E,4R)-3-oxo-4-(m-tolyl)-1-pentenyl]-7-benzoyloxy-2-oxabicyclo[3.3.0]octan-3-one}
Cc1cccc([C@@H](C)C(=O)/C=C/[C@@H]2[C@H]3CC(=O)O[C@H]3C[C@H]2OC(=O)c2ccccc2)c1
(1S,5R,6R,7R)-6-[(1E,4R)-3-oxo-4-(m-tolyl)-1-pentenyl]-7-benzoyloxy-2-oxabicyclo[3.3.0]octan-3-one
CC(C)=O
Acetone
→
Cc1cccc([C@@H](C)[C@H](O)/C=C/[C@@H]2[C@H]3CC(=O)O[C@H]3C[C@H]2OC(=O)c2ccccc2)c1
crude title compound
Cc1cccc([C@@H](C)[C@H](O)/C=C/[C@@H]2[C@H]3CC(=O)O[C@H]3C[C@H]2OC(=O)c2ccccc2)c1
(1S,5R,6R,7R)-6-[(1E,3R,4R)-3-hydroxy-4-(m-tolyl)-1-pentenyl]-7-benzoyloxy-2-oxabicyclo[3.3.0]octan-3-one

المتفاعلات

O=C([O-])O.[Na+]
sodium hydrogen carbonate
C[C@@H]1[C@H]2C[C@@H](C[C@H]1B(Cl)[C@@H]1C[C@@H]3C[C@H]([C@H]1C)C3(C)C)C2(C)C
(−)-B-chlorodiisopinocampheylborane
Cc1cccc([C@@H](C)C(=O)/C=C/[C@@H]2[C@H]3CC(=O)O[C@H]3C[C@H]2OC(=O)c2ccccc2)c1
enone{(1S,5R,6R,7R)-6-[(1E,4R)-3-oxo-4-(m-tolyl)-1-pentenyl]-7-benzoyloxy-2-oxabicyclo[3.3.0]octan-3-one}
Cc1cccc([C@@H](C)C(=O)/C=C/[C@@H]2[C@H]3CC(=O)O[C@H]3C[C@H]2OC(=O)c2ccccc2)c1
(1S,5R,6R,7R)-6-[(1E,4R)-3-oxo-4-(m-tolyl)-1-pentenyl]-7-benzoyloxy-2-oxabicyclo[3.3.0]octan-3-one
CC(C)=O
Acetone

الكواشف

لا شيء

المذيبات

C1CCOC1
THF

ظروف التفاعل

الظروف التفصيلية
See reaction.notes.procedure_details.

المعالجة

  1. 1
    درجة الحرارةcooling for 20 hr
  2. 2
    workup.STIRRINGthe mixture was stirred for 3 hr
  3. 3
    استخلاصthe mixture was extracted with t-butyl methyl ether
  4. 4
    تجفيفThe extract was dried over magnesium sulfate
  5. 5
    تركيزconcentrated under reduced pressure

الإجراء التجريبي

A solution of enone{(1S,5R,6R,7R)-6-[(1E,4R)-3-oxo-4-(m-tolyl)-1-pentenyl]-7-benzoyloxy-2-oxabicyclo[3.3.0]octan-3-one} (147.0 g) synthesized in Example 3 in THF (1480 mL) was cooled to −40° C., (−)-B-chlorodiisopinocampheylborane (1.7 M hexane solution) (721 mL) was added, and the mixture was stirred under ice-cooling for 20 hr. Acetone (183 mL) was added and the mixture was stirred for 3 hr. Aqueous sodium hydrogen carbonate was added, and the mixture was extracted with t-butyl methyl ether. The extract was dried over magnesium sulfate, and concentrated under reduced pressure to give a crude title compound (649.9 g).

المصدر

DOI: 10.6084/m9.figshare.5104873.v1براءة الاختراع: US08877787B2uspto-grants-2014_11