PubMed:15992785 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/15992785","sourcedb":"PubMed","sourceid":"15992785","source_url":"https://www.ncbi.nlm.nih.gov/pubmed/15992785","text":"Regiochemistry of epoxide ring opening in methyl 2,3-anhydro-4-azido-4-deoxy-alpha- and beta-L-lyxopyranosides.\nMethyl 2,3-anhydro-4-O-methanesulfonyl-alpha-d-ribopyranoside (12) was prepared through a new six-step sequence starting from d-arabinose. Chemical behaviour of 12 was further studied under solvolytic conditions and in the presence of azide anion as a nucleophile. Factors governing the regiochemistry of epoxide ring opening are briefly discussed.","tracks":[{"project":"sentences","denotations":[{"id":"TextSentencer_T1","span":{"begin":0,"end":111},"obj":"Sentence"},{"id":"TextSentencer_T2","span":{"begin":112,"end":250},"obj":"Sentence"},{"id":"TextSentencer_T3","span":{"begin":251,"end":376},"obj":"Sentence"},{"id":"TextSentencer_T4","span":{"begin":377,"end":460},"obj":"Sentence"},{"id":"T1","span":{"begin":0,"end":111},"obj":"Sentence"},{"id":"T2","span":{"begin":112,"end":250},"obj":"Sentence"},{"id":"T3","span":{"begin":251,"end":376},"obj":"Sentence"},{"id":"T4","span":{"begin":377,"end":460},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"attributes":[{"subj":"TextSentencer_T1","pred":"source","obj":"sentences"},{"subj":"TextSentencer_T2","pred":"source","obj":"sentences"},{"subj":"TextSentencer_T3","pred":"source","obj":"sentences"},{"subj":"TextSentencer_T4","pred":"source","obj":"sentences"},{"subj":"T1","pred":"source","obj":"sentences"},{"subj":"T2","pred":"source","obj":"sentences"},{"subj":"T3","pred":"source","obj":"sentences"},{"subj":"T4","pred":"source","obj":"sentences"}]},{"project":"Anatomy-UBERON","denotations":[{"id":"T1","span":{"begin":31,"end":38},"obj":"Body_part"},{"id":"T2","span":{"begin":430,"end":437},"obj":"Body_part"}],"attributes":[{"id":"A1","pred":"uberon_id","subj":"T1","obj":"http://purl.obolibrary.org/obo/UBERON_0004111"},{"id":"A2","pred":"uberon_id","subj":"T2","obj":"http://purl.obolibrary.org/obo/UBERON_0004111"},{"subj":"T1","pred":"source","obj":"Anatomy-UBERON"},{"subj":"T2","pred":"source","obj":"Anatomy-UBERON"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"sentences","color":"#d793ec","default":true},{"id":"Anatomy-UBERON","color":"#93ecbc"}]}]}}