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Volumn 32, Issue 29, 1991, Pages 3483-3486

[4+2] Cycloadditions of 2-(trialkylsilyloxy)-allylidenecyclopropanes - synthesis of spiro[2.5]octan-5-ones

Author keywords

BF3 catalysis; Diels Alder reactions; Ring strain and donor activated dienes; spirocyclopropane mimic of gem dimethyl groups

Indexed keywords

POLYCYCLIC HYDROCARBON;

EID: 0025780167     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/0040-4039(91)80812-K     Document Type: Article
Times cited : (19)

References (21)
  • 15
    • 84914311808 scopus 로고    scopus 로고
    • 3J= 9.26 He.), 2. [[Truncated]]
  • 16
    • 84914311807 scopus 로고    scopus 로고
    • 8
  • 17
    • 84914311806 scopus 로고    scopus 로고
    • Typical procedure for [4+2] cycloadditions with 2-silyloxyallylidenecyclopropanes 2:870 mg (5.2 mmol) of 2-(trimethyksilyloxy)allylidenecyclopropanc 2a and 1 g (10.2 mmol) of maleic anhydride (sublimed before use) in 3 ml of dry benzene were heated in a sealed glass tube under argon at 130 °C for 24 hrs. After evaporation of the solvent under reduced pressure, excess maleic anhydride was sublimed off. The residue was disolved in 30 ml of ether and was left to crystallize at 0 °C. The precipitate was washed with cold ether and was then recrystalized and dried, yield 685 mg (68%) 12 as white crystals, mp. 75 °C.
  • 20
    • 84914311805 scopus 로고    scopus 로고
    • 8


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.