{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T10:43:14Z","timestamp":1775299394909,"version":"3.50.1"},"reference-count":23,"publisher":"CLOCKSS Archive","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["HETEROCYCLES"],"published-print":{"date-parts":[[2003]]},"DOI":"10.3987\/com-02-9698","type":"journal-article","created":{"date-parts":[[2009,3,5]],"date-time":"2009-03-05T07:35:41Z","timestamp":1236238541000},"page":"879","source":"Crossref","is-referenced-by-count":22,"title":["Ethyl Vinyl Ether - An Agent for Protection of the Pyrazole NH-Fragment. A Convenient Method for the Preparation of N-Unsubstituted 4-Alkynylpyrazoles"],"prefix":"10.13030","volume":"60","author":[{"given":"Jos\u00e9","family":"Elguero","sequence":"first","affiliation":[]},{"given":"Sergei","family":"F. Vasilevsky","sequence":"additional","affiliation":[]},{"given":"Svetlana","family":"V. Klyatskaya","sequence":"additional","affiliation":[]},{"given":"Eugene","family":"V. Tretyakov","sequence":"additional","affiliation":[]}],"member":"5187","reference":[{"key":"10.3987\/COM-02-9698-1","doi-asserted-by":"crossref","unstructured":"1. S. F. Vasilevsky, E. V. Tretyakov, and J. Elguero, Synthesis and Properties of Acetylenic Derivatives of Pyrazoles, Adv. Heterocycl. Chem., 2002, 82, 1.","DOI":"10.1016\/S0065-2725(02)82026-8"},{"key":"10.3987\/COM-02-9698-2","doi-asserted-by":"crossref","unstructured":"2. F. Seela and M. Zulauf, J. Chem. Soc., Perkin Trans. 1, 1999, 479.","DOI":"10.1039\/a808769e"},{"key":"10.3987\/COM-02-9698-3","doi-asserted-by":"crossref","unstructured":"3, S. F. Vasilevsky, E. V. Tretyakov, O. M. Usov, Y. N. Molin, S. V. Fokin, Y. G. Shwedenkov, V. N. Ikorskii, G. V. Romanenko, R. Z. Sagdeev, and V. I. Ovcharenko, Mendeleev Comm., 1998, 216.","DOI":"10.1070\/MC1998v008n06ABEH000997"},{"key":"10.3987\/COM-02-9698-4","doi-asserted-by":"crossref","unstructured":"4. E. V. Tretyakov, R. I. Samoilova, Y. V. Ivanov, V. F. Plyusnin, S. V. Pashchenko, and S. F. Vasilevsky, Mendeleev Comm., 1999, 92.","DOI":"10.1070\/MC1999v009n03ABEH001081"},{"key":"10.3987\/COM-02-9698-5","unstructured":"5. S. F. Vasilevsky, A. V. Pozdnyakov, and M. S. Shvartsberg, Izv. Akad. Nauk SSSR, Ser. Khim., 1985, 1367 [Chem. Abstr., 1986, 104, 34057]."},{"key":"10.3987\/COM-02-9698-6","doi-asserted-by":"crossref","unstructured":"6. M. A. de la Rosa, E. Velarde, and A. Guzm\u00e1n, Synth. Commun., 1990, 20, 2059.","DOI":"10.1080\/00397919008053137"},{"key":"#cr-split#-10.3987\/COM-02-9698-7.1","doi-asserted-by":"crossref","unstructured":"(a) L. Bleicher and N. D. P. Cosford, Synlett, 1995, 1115;","DOI":"10.1055\/s-1995-5220"},{"key":"#cr-split#-10.3987\/COM-02-9698-7.2","doi-asserted-by":"crossref","unstructured":"(b) A. L. Llamas-Saiz, C. Foces-Foces, C. Fontenas, and J. Elguero, Mol. Online, 1998, 2, 76;","DOI":"10.1007\/s007830050058"},{"key":"#cr-split#-10.3987\/COM-02-9698-7.3","doi-asserted-by":"crossref","unstructured":"(c) J. L. Wright, T. F. Gregory, P. A. Boxer, L. T. Meltzer, K. A. Serpa, L. D. Wise, S. Hong-Bae, J. C. Huang, C. S. Konkoy, R. B. Upasani, E. R. Whittemore, R. M. Woodward, K. C. Yang, and Z.-L. Zhou, Bioorg. Med. Chem. Lett., 1999, 9, 2815.","DOI":"10.1016\/S0960-894X(99)00482-5"},{"key":"10.3987\/COM-02-9698-8","unstructured":"8. De La Rosa\u2019s method consists in the cross-coupling of aryl halides with 1-alkynes with the catalytic system formed by Pd\/C, PPh4 and CuI in a 1:4:2 ratio with 2.5 equivalents of K2CO3 in dimethylether-water (1:1) at 80 \u00b0C.6"},{"key":"10.3987\/COM-02-9698-9","doi-asserted-by":"crossref","unstructured":"9. B.-R. Tolf, R. Dahlbom, H. Theorell, and A. Akeson, Acta Chem. Scand., B, 1982, 36, 101.","DOI":"10.3891\/acta.chem.scand.36b-0101"},{"key":"10.3987\/COM-02-9698-10","doi-asserted-by":"crossref","unstructured":"10. S. L. Dax and S. C. Cook, Bioorg. Med. Chem. Lett., 1996, 6, 797.","DOI":"10.1016\/0960-894X(96)00108-4"},{"key":"10.3987\/COM-02-9698-11","doi-asserted-by":"crossref","unstructured":"11. G. Heinisch, W. Holzer, and C. Obala, Monatsh. Chem., 1988, 119, 253.","DOI":"10.1007\/BF00809599"},{"key":"10.3987\/COM-02-9698-12","doi-asserted-by":"crossref","unstructured":"12. J. Felding, J. Kristensen, T. Bjerregaard, L. Sander, P. Veds\u00f8, and M. Begtrup, J. Org. Chem., 1999, 64, 4196.","DOI":"10.1021\/jo982160n"},{"key":"10.3987\/COM-02-9698-13","doi-asserted-by":"crossref","unstructured":"13. J. Elguero, C. Jaramillo, and C. Pardo, Synthesis, 1997, 563","DOI":"10.1055\/s-1997-1230"},{"key":"10.3987\/COM-02-9698-14","unstructured":"14. J. R. Carson, U.S. Patent 4,663,334, 1987 [Chem. Abstr., 1987, 107, 77423]."},{"key":"10.3987\/COM-02-9698-15","doi-asserted-by":"crossref","unstructured":"15. W. B. Austin, N. Bilow, W. J. Kelleghan, and K. S. Y. Lau, J. Org. Chem., 1981, 46, 2280.","DOI":"10.1021\/jo00324a015"},{"key":"10.3987\/COM-02-9698-16","doi-asserted-by":"crossref","unstructured":"16. S. V. Klyatskaya, E. V. Tretyakov, and S. F. Vasilevsky, Russ. Chem. Bull., Int. Ed., 2002, 51, 128.","DOI":"10.1023\/A:1015026200647"},{"key":"10.3987\/COM-02-9698-17","doi-asserted-by":"crossref","unstructured":"17. E. V. Tretyakov, D. W. Knight, and S. F. Vasilevsky, J. Chem. Soc., Perkin Trans. 1, 1999, 3713.","DOI":"10.1039\/a903754c"},{"key":"10.3987\/COM-02-9698-18","doi-asserted-by":"crossref","unstructured":"18. A. S. Hay, J. Org. Chem., 1962, 27, 3320.","DOI":"10.1021\/jo01056a511"},{"key":"10.3987\/COM-02-9698-19","doi-asserted-by":"crossref","unstructured":"19. N. A. Bumagin, A. B. Ponomaryov, and I. P. Beletskaya, Synthesis, 1984, 728.","DOI":"10.1055\/s-1984-30947"},{"key":"10.3987\/COM-02-9698-20","doi-asserted-by":"crossref","unstructured":"20. R. D. Stephens and C. E. Castro, J. Org. Chem., 1963, 28, 3313.","DOI":"10.1021\/jo01047a008"},{"key":"10.3987\/COM-02-9698-21","doi-asserted-by":"crossref","unstructured":"21. R. H\u00fcttel, O. Sch\u00e4fer, and P. Jochum, Liebigs. Ann., 1955, 593, 200.","DOI":"10.1002\/jlac.19555930303"}],"container-title":["HETEROCYCLES"],"original-title":[],"language":"en","deposited":{"date-parts":[[2024,6,24]],"date-time":"2024-06-24T20:35:18Z","timestamp":1719261318000},"score":1,"resource":{"primary":{"URL":"https:\/\/triggered.stanford.clockss.org\/ServeContent?doi=10.3987%2Fcom-02-9698"},"secondary":[{"URL":"https:\/\/triggered.edinburgh.clockss.org\/ServeContent?doi=10.3987%2Fcom-02-9698","label":"edinburgh"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2003]]},"references-count":23,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2003]]}},"alternative-id":["COM-02-9698"],"URL":"https:\/\/doi.org\/10.3987\/com-02-9698","relation":{},"ISSN":["0385-5414"],"issn-type":[{"value":"0385-5414","type":"print"}],"subject":[],"published":{"date-parts":[[2003]]}}}