1998年4月
Enhanced endo selectivity in 1,3-dipolar cycloaddition of pyrazolone N,N-dioxides with dipolarophiles having ether and carbonyl groups. Role of the remarkably long N-N bond
TETRAHEDRON LETTERS
- ,
- ,
- 巻
- 39
- 号
- 18
- 開始ページ
- 2761
- 終了ページ
- 2764
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1016/S0040-4039(98)00332-3
- 出版者・発行元
- PERGAMON-ELSEVIER SCIENCE LTD
The X-ray analysis of 2,5-dimethylpyrazolone N,N-dioxides (1c) revealed that the N-N bond is remarkably long [1.650(4) Angstrom]. Inspection of the crystal packing diagram suggested that the interaction between the nitrogen atoms of the dioxides and the carbonyl oxygen is operative, indicating the presence of a molecular complex before the formation of the TS in the 1,3-dipolar cycloaddition. (C) 1998 Elsevier Science Ltd. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/S0040-4039(98)00332-3
- ISSN : 0040-4039
- CiNii Articles ID : 80010230779
- Web of Science ID : WOS:000073062400030