Structure determination of the adducts of 1,3‐Di‐ tert ‐butyl‐ and 1,2,3,4‐Tetraphenyldiazocyclopentadiene with dimethyl acetylenedicarboxylate by carbon‐13 NMR | Zendy

Braun Siegmar | Zendy; Sturm Volker | Zendy; Runzheimer KarlOtto | Zendy

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Structure determination of the adducts of 1,3‐Di‐ tert ‐butyl‐ and 1,2,3,4‐Tetraphenyldiazocyclopentadiene with dimethyl acetylenedicarboxylate by carbon‐13 NMR

Author(s) -

Braun Siegmar,

Sturm Volker,

Runzheimer KarlOtto

Publication year - 1988

Publication title -

chemische berichte

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 0009-2940

DOI - 10.1002/cber.19881210530

Subject(s) - chemistry , dimethyl acetylenedicarboxylate , adduct , carbon 13 nmr , medicinal chemistry , acetylenedicarboxylate , stereochemistry , organic chemistry , cycloaddition , catalysis

It is shown by NMR spectroscopic arguments, including twodimensional 13 C INADEQUATE experiments, that the adducts of the diazocyclopentadienes 1a and 1b with dimethyl acetylenedicarboxylate have the 3 H ‐indazole structure 3 and not, as was reported in the case of 1b , the spirononatetraene structure 2 .

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