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Volumn 64, Issue 15, 1999, Pages 5472-5478

Chiral N-acyl-tert-butanesulfinamides: The 'safety-catch' principle applied to diastereoselective enolate alkylations

Author keywords

[No Author keywords available]

Indexed keywords

SULFINAMIDE;

EID: 0033597843     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo990271w     Document Type: Article
Times cited : (56)

References (37)
  • 2
    • 0001466559 scopus 로고
    • For N-acylsulfonamide alkylation reactions in solution, see: (a) Belletire, J. L.; Spletzer, E. G. Tetrahedron Lett. 1988, 27, 131. (b) Belletire, J. L.; Mahmoodi, N. O. Synth. Commun. 1989, 19, 3371.
    • (1988) Tetrahedron Lett. , vol.27 , pp. 131
    • Belletire, J.L.1    Spletzer, E.G.2
  • 3
    • 25444461528 scopus 로고
    • For N-acylsulfonamide alkylation reactions in solution, see: (a) Belletire, J. L.; Spletzer, E. G. Tetrahedron Lett. 1988, 27, 131. (b) Belletire, J. L.; Mahmoodi, N. O. Synth. Commun. 1989, 19, 3371.
    • (1989) Synth. Commun. , vol.19 , pp. 3371
    • Belletire, J.L.1    Mahmoodi, N.O.2
  • 16
    • 0030810476 scopus 로고    scopus 로고
    • Myers and co-workers have developed specialized conditions to provide highly enantiomerically enriched carboxylic acid, alcohol, aldehyde, and ketone products upon pseudoephedrine auxiliary cleavage: Myers, A. G.; Yang, B. H.; Chen, H.; McKinstry, L.; Kopecky, D. J.; Gleason, J. L. J. Am. Chem. Soc. 1997, 119, 6496.
    • (1997) J. Am. Chem. Soc. , vol.119 , pp. 6496
    • Myers, A.G.1    Yang, B.H.2    Chen, H.3    McKinstry, L.4    Kopecky, D.J.5    Gleason, J.L.6
  • 18
    • 0030694323 scopus 로고    scopus 로고
    • α-Substituted amines
    • We have since employed tert-butanesulfinimines for the asymmetric synthesis of the following. (a) α-Substituted amines: Liu, G.; Cogan, D. A.; Ellman, J. A. J. Am. Chem. Soc. 1997, 119, 9913. (b) α,α-Dibranched amines: Cogan, D. A.; Ellman, J. A. J. Am. Chem. Soc. 1999, 121, 268. β-Substituted β-amino acids, β,β-disubstituted β-amino acids, and α,β-disubstituted β-amino acids: Tang, T. P.; Ellman, J. A. J. Org. Chem. 1999, 64, 12.
    • (1997) J. Am. Chem. Soc. , vol.119 , pp. 9913
    • Liu, G.1    Cogan, D.A.2    Ellman, J.A.3
  • 19
    • 0033550526 scopus 로고    scopus 로고
    • α,α-Dibranched amines
    • We have since employed tert-butanesulfinimines for the asymmetric synthesis of the following. (a) α-Substituted amines: Liu, G.; Cogan, D. A.; Ellman, J. A. J. Am. Chem. Soc. 1997, 119, 9913. (b) α,α-Dibranched amines: Cogan, D. A.; Ellman, J. A. J. Am. Chem. Soc. 1999, 121, 268. β-Substituted β-amino acids, β,β-disubstituted β-amino acids, and α,β-disubstituted β-amino acids: Tang, T. P.; Ellman, J. A. J. Org. Chem. 1999, 64, 12.
    • (1999) J. Am. Chem. Soc. , vol.121 , pp. 268
    • Cogan, D.A.1    Ellman, J.A.2
  • 20
    • 0033534429 scopus 로고    scopus 로고
    • β-Substituted β-amino acids, β,β-disubstituted β-amino acids, and α,β-disubstituted β-amino acids
    • We have since employed tert-butanesulfinimines for the asymmetric synthesis of the following. (a) α-Substituted amines: Liu, G.; Cogan, D. A.; Ellman, J. A. J. Am. Chem. Soc. 1997, 119, 9913. (b) α,α-Dibranched amines: Cogan, D. A.; Ellman, J. A. J. Am. Chem. Soc. 1999, 121, 268. β-Substituted β-amino acids, β,β-disubstituted β-amino acids, and α,β-disubstituted β-amino acids: Tang, T. P.; Ellman, J. A. J. Org. Chem. 1999, 64, 12.
    • (1999) J. Org. Chem. , vol.64 , pp. 12
    • Tang, T.P.1    Ellman, J.A.2
  • 24
    • 0344875809 scopus 로고    scopus 로고
    • note
    • LTMP provides higher conversions and diastereoselectivities than LDA in enolate alkylation reactions of these derivatives. For example, treatment of (rac)-10 with 2.5 equiv of LDA followed by alkylation with EtI results in a 70:30 mixture of (rac)-14.
  • 32
    • 0344012775 scopus 로고    scopus 로고
    • note
    • In initial studies towards the N-alkylation of N-acyl-tert-butanesulfinamides or N-acyl-tert-butanesulfonamides employing iodoacetonitrile (ref 4), unwanted S- and O-alkylation are also observed.
  • 34
    • 0344443980 scopus 로고    scopus 로고
    • note
    • The N-acyloxazolidinone asymmetric enolate alkylation chemistry of Evans (ref 9) was used to prepare 22.
  • 35
    • 0031483042 scopus 로고    scopus 로고
    • A support-bound tert-butanesulfinamide chiral auxiliary and linker will be useful for the preparation of other classes of compounds. For example, sulfinimines are versatile chiral nitrogen intermediates in asymmetric synthesis (see ref 16 and Davis, F. A.; Portonovo, P. S.; Reddy, R. E.; Reddy, G. V.; Szewczyk, J. M.; Zhou, P. Phosphorus, Silicon Relat. Elem. 1997, 120&121, 291).
    • (1997) Phosphorus, Silicon Relat. Elem. , vol.120-121 , pp. 291
    • Davis, F.A.1    Portonovo, P.S.2    Reddy, R.E.3    Reddy, G.V.4    Szewczyk, J.M.5    Zhou, P.6


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.