Novel Synthesis of 3-Amino-4-oxo-(2H)-pyrazolo[3′,4′:4,5]pyrimido-[2,1-b]benzothiazole and its 2- and 3-Substituted Derivatives
Reaction of 4H‐pyrimido[2,1‐b]benzothiazole‐2‐thiomethyl‐3‐cyano‐4‐one (1) with hydrazine hydrate/aryl hydrazine/heteryl hydrazine in the presence of anhydrous potassium carbonate and dimethyl formamide afforded 3‐amino‐4‐oxo‐(2H)/aryl/heteryl pyrazolo[3′,4′:4,5]pyrimido[2,1‐b]benzothiazoles in good...
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| Veröffentlicht in: | Journal of heterocyclic chemistry 2003-05, Vol.40 (3), p.547-551 |
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| container_title | Journal of heterocyclic chemistry |
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| creator | Baheti, K. G. Kuberkar, S. V. |
| description | Reaction of 4H‐pyrimido[2,1‐b]benzothiazole‐2‐thiomethyl‐3‐cyano‐4‐one (1) with hydrazine hydrate/aryl hydrazine/heteryl hydrazine in the presence of anhydrous potassium carbonate and dimethyl formamide afforded 3‐amino‐4‐oxo‐(2H)/aryl/heteryl pyrazolo[3′,4′:4,5]pyrimido[2,1‐b]benzothiazoles in good yield. These pyrazole derivatives on diazotization followed by replacement with hydroxy, chloro, bromo, iodo and on reduction gave the corresponding 3‐substituted derivatives. |
| doi_str_mv | 10.1002/jhet.5570400322 |
| format | Article |
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G.</creatorcontrib><creatorcontrib>Kuberkar, S. V.</creatorcontrib><title>Novel Synthesis of 3-Amino-4-oxo-(2H)-pyrazolo[3′,4′:4,5]pyrimido-[2,1-b]benzothiazole and its 2- and 3-Substituted Derivatives</title><title>Journal of heterocyclic chemistry</title><description>Reaction of 4H‐pyrimido[2,1‐b]benzothiazole‐2‐thiomethyl‐3‐cyano‐4‐one (1) with hydrazine hydrate/aryl hydrazine/heteryl hydrazine in the presence of anhydrous potassium carbonate and dimethyl formamide afforded 3‐amino‐4‐oxo‐(2H)/aryl/heteryl pyrazolo[3′,4′:4,5]pyrimido[2,1‐b]benzothiazoles in good yield. These pyrazole derivatives on diazotization followed by replacement with hydroxy, chloro, bromo, iodo and on reduction gave the corresponding 3‐substituted derivatives.</description><issn>0022-152X</issn><issn>1943-5193</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNqFkMtKAzEUhoMoWKtrt7NUaGouc-noqtRLFdFFK4pSQmZyQqPjRCaxOq4E38hH8kmcWlFcuTk3_u_n8CO0SUmXEsJ2bqfgu1GUkJAQztgSatE05DiiKV9GrUbBMI3Y1Spac-62WSlPkhZ6O7MzKIJRXfopOOMCqwOO-_emtDjE9tniLTbcxg91JV9sYW_4x-t7J2zKbtiJJs3Z3Btl8Q3rUJxNMihfrJ-auRYCWarAeBcw_DVyPHrMnDf-0YMK9qEyM-nNDNw6WtGycLDx3dvo4vBgPBji0_Oj40H_FOc8IQyDBM5oGktOiWaZzqVkMo_jrKeZZpSlJM1ASq0SpYAnuaIQRYoSltFU9lTI22hn4ZtX1rkKtHho3pdVLSgR8wzFPEPxm2FD7C2IJ1NA_Z9cnAwPxn9ovKCN8_D8Q8vqTsQJTyJxeXYkLvcP0-twRMU1_wSdzIg6</recordid><startdate>200305</startdate><enddate>200305</enddate><creator>Baheti, K. G.</creator><creator>Kuberkar, S. V.</creator><general>Wiley-Blackwell</general><general>Wiley‐Blackwell</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>200305</creationdate><title>Novel Synthesis of 3-Amino-4-oxo-(2H)-pyrazolo[3′,4′:4,5]pyrimido-[2,1-b]benzothiazole and its 2- and 3-Substituted Derivatives</title><author>Baheti, K. G. ; Kuberkar, S. V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3702-eae32196a310f2bfcaa2ac66b8f2f212909beaafd7dde37cd1e55d102b19a8d43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Baheti, K. G.</creatorcontrib><creatorcontrib>Kuberkar, S. 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V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Novel Synthesis of 3-Amino-4-oxo-(2H)-pyrazolo[3′,4′:4,5]pyrimido-[2,1-b]benzothiazole and its 2- and 3-Substituted Derivatives</atitle><jtitle>Journal of heterocyclic chemistry</jtitle><date>2003-05</date><risdate>2003</risdate><volume>40</volume><issue>3</issue><spage>547</spage><epage>551</epage><pages>547-551</pages><issn>0022-152X</issn><eissn>1943-5193</eissn><abstract>Reaction of 4H‐pyrimido[2,1‐b]benzothiazole‐2‐thiomethyl‐3‐cyano‐4‐one (1) with hydrazine hydrate/aryl hydrazine/heteryl hydrazine in the presence of anhydrous potassium carbonate and dimethyl formamide afforded 3‐amino‐4‐oxo‐(2H)/aryl/heteryl pyrazolo[3′,4′:4,5]pyrimido[2,1‐b]benzothiazoles in good yield. These pyrazole derivatives on diazotization followed by replacement with hydroxy, chloro, bromo, iodo and on reduction gave the corresponding 3‐substituted derivatives.</abstract><cop>Hoboken</cop><pub>Wiley-Blackwell</pub><doi>10.1002/jhet.5570400322</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| issn | 0022-152X 1943-5193 |
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| source | Wiley Online Library All Journals |
| title | Novel Synthesis of 3-Amino-4-oxo-(2H)-pyrazolo[3′,4′:4,5]pyrimido-[2,1-b]benzothiazole and its 2- and 3-Substituted Derivatives |
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