作者:Stephan Fritschi、Andrea Vasella
DOI:10.1002/hlca.19910740837
日期:1991.12.11
The dihydropyran 3 reacts with sulfonyl azides to give the known (sulfonylimino)-ethers ( = lactone sul-fonylimines) 4 and 18. Reaction of 4 with NH2NH2 · H2O leads to the aminoiriazole-dibulanol 5, characterized as its tetraacetate 8, and not, as previously claimed, to 6 or 7. Similarly, the dihydrofuran-derived (tosylimino)-ether 10 yields 11 The structure of 5 was established by X-ray analysis,
二氢吡喃3与磺酰基叠氮化物反应,得到已知的(磺酰亚胺基)醚(=内酯磺酰磺胺基)4和18。的反应4与NH 2 NH 2 ·H 2 ö通向aminoiriazole-dibulanol 5,其特征在于作为其四乙8,而不是如先前权利,至6或7。同样,由二氢呋喃衍生的(甲苯磺酸)-醚10的产率为11。通过X射线分析确定5的结构,并提出其形成机理。4与NH 2 NMe 2的反应得到内酯16和酰肼17。咪唑催化类似地抑制17的形成,[(三氟甲基)磺酰基]亚胺18生成16,并通过与NH 2 N(Me)Ph或4-氨基-4H反应-1,2,4-三唑,内酯19和加合物20。从10或从22获得1,4-内酯21。通过X射线分析确定了20的结构。用BuLi处理16,然后用BnBr处理,得到α-烷基化内酯23。