作者:Tom Maricich、Matthew Allan、Brett Kislin、Andrea Chen、Fan-Chun Meng、Christine Bradford、Nai-Chia Kuan、Jeremy Wood、Omonigho Aisagbonhi、Alethea Poste、Dustin Wride、Sylvia Kim、Therese Santos、Michael Fimbres、Dianne Choi、Haydi Elia、Joseph Kaladjian、Ali Abou-Zahr、Arturo Mejia
DOI:10.1055/s-0033-1339921
日期:——
iodoethane and silver(I) oxide in dichloromethane. This sulfonimidate directly ethylates various acids to esters; the stronger the acid, the faster it alkylates and in higher yield. It readily ethylates alcohols and phenols to ethers at room temperature in the presence of tetrafluoroboric acid catalyst without molecular rearrangements or racemization. We have defined these reactions as SNAAP alkylations:
摘要 稳定,晶状ñ -叔丁基-4- nitrobenzenesulfonimidate已经通过直接O形乙基高收率制备ñ -叔丁基-4-硝基苯磺酰胺与碘乙烷和二氯甲烷银(I)氧化物。该亚磺酸磺酸盐将各种酸直接乙基化为酯。酸越强,烷基化速度越快,收率越高。在四氟硼酸催化剂存在下,在室温下容易将醇和酚乙基化为醚,而不会发生分子重排或外消旋化。我们定义这些反应如烷基化SNAAP:小号ubstitution,Ñ的ucleophilic一个的CID,一个lcohols和p henols]。所述硬sulfonimidate烷化剂是化学选择性的,宁愿氧气>氮气>硫。烷基化的磺酰胺副产物易于再循环至磺酰亚胺酯。 稳定,晶状ñ -叔丁基-4- nitrobenzenesulfonimidate已经通过直接O形乙基高收率制备ñ -叔丁基-4-硝基苯磺酰胺与碘乙烷和二氯甲烷银(I)氧化物。该亚磺酸磺酸盐将各种酸直