28043-10-9Relevant articles and documents
TiF4-mediated biomimetic alkylation-cyclization cascade reaction of 2-trimethylsilylmethyl-1,5-dienes with aldehydes
Anastasia, Luigi,Giannini, Elios,Zanoni, Giuseppe,Vidari, Giovanni
, p. 5803 - 5806 (2005)
TiF4 has proven to be the Lewis acid of choice for promoting the biomimetic addition of 2-trimethylsilylmethyl-1,5-dienes to aliphatic aldehydes with concomitant cyclization. 1,3-cis-Disubstituted methylenecyclohexanes are thus produced in good yields and high diastereoselectivity. The reaction appears to proceed via a highly concerted mechanism involving a chair-like transition state.
Electrophilic cyclization of polyene allylsylanes. Synthesis of albicanyl acetate
Armstrong, Rosemary J.,Harris, Francis L.,Weiler, Larry
, p. 673 - 675 (1982)
The allylsilanes 5 (a, R=(CH3)2CCHCH2; b, R=(CH3)2CCHCH2CH2C(CH3)CHCH2) were prepared by a nickel(II) catalyzed coupling of trimethylsilylmethylmagnesium chloride with the enol phosphate of the corresponding β-keto esters.Stannic chloride and mercuric trifluoroacetate effected a cyclization of 5.The product from 5b was converted into the marine natural product, albicanyl acetate (1).
Total synthesis and structural revision of viridicatumtoxin B
Nicolaou,Nilewski, Christian,Hale, Christopher R. H.,Ioannidou, Heraklidia A.,Elmarrouni, Abdelatif,Koch, Lizanne G.
supporting information, p. 8736 - 8741 (2013/09/12)
Will the real viridicatumtoxin B please stand up: The total synthesis of viridicatumtoxin B resulted in its structural revision and opens the way for analogue construction and biological evaluation of this complex tetracycline-like antibiotic. The highly convergent strategy employed allows for swift construction of the entire carbocyclic framework of the molecule. Copyright