메뉴 건너뛰기




Volumn 48, Issue 52, 2007, Pages 9171-9175

SmI2-induced reductive cyclization of optically active β-alkoxyvinyl sulfoxides with aldehyde

Author keywords

C C bond formation; Ethynyl p tolylsulfoxide; Polycyclic ethers; Samarium diiodide; Tetrahydropyranol

Indexed keywords

ALDEHYDE; BETA ALKOXYVINYL SULFOXIDE DERIVATIVE; SAMARIUM DIIODIDE; SULFOXIDE; TETRAHYDROPYRAN DERIVATIVE; UNCLASSIFIED DRUG;

EID: 36448929785     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2007.10.102     Document Type: Article
Times cited : (15)

References (48)
  • 1
    • 1542502091 scopus 로고
    • For reviews on polycyclic ethers, see:
    • For reviews on polycyclic ethers, see:. Yasumoto T., and Murata M. Chem. Rev. 93 (1993) 1897
    • (1993) Chem. Rev. , vol.93 , pp. 1897
    • Yasumoto, T.1    Murata, M.2
  • 32
    • 36448958873 scopus 로고    scopus 로고
    • Kimura, T.; Nakata, T. Abstract of Papers, Part 2, p 1203, 87th Annual Meeting of the Chemical Society of Japan, Osaka, Japan, March 25-28, 2007.
  • 33
    • 36448931798 scopus 로고    scopus 로고
    • Kimura, T.; Hagiwara, M.; Nakata, T. Abstract of Papers, Part 4, p 20, 127th Annual Meeting of the Pharmaceutical Society of Japan, Toyama, Japan, March 28-30, 2007.
  • 40
    • 36448996304 scopus 로고    scopus 로고
    • note
    • 1/2 = 7.0 Hz, 1H). NOEs between C2-H and C6-H in 9b and 12b were observed.
  • 42
    • 36448944110 scopus 로고    scopus 로고
    • note
    • 1H NMR data. 10b: δ 6.53 (dd, J = 15.3, 5.5 Hz, 1H), 6.38 (dd, J = 15.3, 1.2 Hz, 1H), 5.67 (m, 1H), 4.69 (ddd, J = 11.0, 9.8, 4.9 Hz, 1H); 13b: δ 6.49 (dd, J = 15.2, 5.8 Hz, 1H), 6.41 (d, J = 15.2 Hz, 1H), 5.65 (m, 1H), 4.66 (ddd, J = 10.9, 10.9, 4.8 Hz, 1H). Alkaline hydrolysis of the diacetate 10b followed by acetylation afforded a 2:3 mixture of 2,6-syn-2,3-cis-tetrahydropyran 9b and 2,6-anti-2,3-trans-isomer via an intramolecular cyclization, and the same reaction of 13b predominantly afforded 2,6-anti-2,3-trans-tetrahydropyran. These results confirmed the β-configuration of the 3-acetoxy group in 10b and 13b.
  • 43
    • 36448947021 scopus 로고    scopus 로고
    • note
    • 6 They proposed similar transition states through sulfoxide and Sm(III) coordination to those shown here. However, they noted that it is difficult to propose a transition state structure for conversion of 21 to 22; a possible transition state structure xii does not adopt the familiar chair-like conformation. Their result would be well explained by our proposed transition state, i.e., the cyclization of 21 should proceed through the transition state xiii to give 22.{A figure is presented}
  • 44
    • 36448988759 scopus 로고    scopus 로고
    • note
    • 2O, 60 °C, 88% for 16, 79% for 19.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.