Constant time HMBC (CT-HMBC), a new HMBC technique useful for improving separation of cross peaks

Tetrahedron Letters

Volumn 39, Issue 40, 1998, Pages 7337-7340

  Furihata, Kazuo ^a   Seto, Haruo ^a  

^a UNIVERSITY OF TOKYO   (Japan)

Author keywords

NMR

Indexed keywords

ARTICLE; CHEMICAL BOND; CHEMICAL STRUCTURE; NUCLEAR MAGNETIC RESONANCE; STRUCTURE ANALYSIS; TECHNIQUE; TIME;

EID: 0032192215     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(98)01574-3     Document Type: Article

References (6)

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3. 3) A. Bax and R. Freeman, J. Magn. Reson., 44, 542 (1981). M. Ranee, G. Wagner, O. W. Sorensen, K. Wuthrich and R. R. Ernst, J. Magn. Reson., 59, 250 (1984).
4. 3) A. Bax and R. Freeman, J. Magn. Reson., 44, 542 (1981). M. Ranee, G. Wagner, O. W. Sorensen, K. Wuthrich and R. R. Ernst, J. Magn. Reson., 59, 250 (1984).
5. 1 before the initiation of signal acquisition together with proton decoupling during signal acquisition gives a decoupled version of CT-HMBC-1. As in the case of decoupled HMBC (D-HMBC, see K. Furihata and H. Seto, Tetrahedron Lett., 36, 2817 (1995)), this modification suppresses the swelling of cross peaks and gives better spectra. Details will be published elsewhere.
6. 1H correlations with different coupling values more efficiently than HMBC, and has an advantage comparable to that of 3D-HMBC reported previously by us (K. Furihata and H. Seto: Tetrahedron Lett., 37, 8901 (1996)). This is the reason why CT-HMBC-1 gives better results than HMBC.