PubMed:16084504 / 388-645 JSONTXT

{"project":"sentences","denotations":[{"id":"TextSentencer_T3","span":{"begin":0,"end":257},"obj":"Sentence"},{"id":"T3","span":{"begin":0,"end":257},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The best yields of the major products, the 3-O-alkyl ethers, were obtained by reaction of the alkyl bromide with the monodibutylstannylene acetal in DMF in the presence of cesium fluoride for extended periods of time at moderate temperatures (65 degrees C)."}