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Biomol. Chem."],"abstract":"<jats:p>PTSA catalyzed divergent synthetic routes toward 3-aryl coumarins and indenes were developed using ketene dithioacetals. These transformations are transition-metal and oxidant free, proceed under mild conditions, and provide quick access to these important structural motifs.<\/jats:p>","DOI":"10.1039\/d2ob01558g","type":"journal-article","created":{"date-parts":[[2022,10,25]],"date-time":"2022-10-25T15:41:48Z","timestamp":1666712508000},"page":"8907-8911","update-policy":"https:\/\/doi.org\/10.1039\/rsc_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Br\u00f8nsted acid catalyzed annulations of ketene dithioacetals: synthesis of 3-aryl coumarins and indenes"],"prefix":"10.1039","volume":"20","author":[{"given":"Shivani","family":"Arora","sequence":"first","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, U.P., India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Surya Pratap","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, U.P., India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Parashuram","family":"Sharma","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, U.P., India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9703-6306","authenticated-orcid":false,"given":"Anand","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, U.P., India"},{"name":"Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur, Kanpur-208016, U.P., India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"292","published-online":{"date-parts":[[2022]]},"reference":[{"key":"D2OB01558G\/cit1a\/1","doi-asserted-by":"crossref","first-page":"1197","DOI":"10.3390\/molecules22071197","volume":"22","author":"Li","year":"2017","journal-title":"Molecules"},{"key":"D2OB01558G\/cit1b\/1","doi-asserted-by":"crossref","first-page":"741","DOI":"10.1080\/00397911.2014.979947","volume":"45","author":"Rahmani-Nezhad","year":"2015","journal-title":"Synth. 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