Dearomative 1,3-dipolar cycloadditions of 1-Boc-pyrroles with in situ generated silver α-bromo alkylidenenitronates delivered a series of 3a,6a-dihydro-4-Boc-pyrrolo[2,3-d]isoxazole-2-oxides (17–91% yields) under very mild conditions. N-Deoxygenation of the cycloaddition product gave a dihydro-pyrrolo[2,3-d]isoxazole, elaborations of which produced various functionalized 2,3-dihydropyrroles and pyrrolidines
1-Boc-
吡咯与原位生成的 α-
溴亚烷基亚硝基
银的脱芳香 1,3-偶极环加成反应生成一系列 3 a ,6 a -二氢-4-Boc-
吡咯并[2,3- d ]
异恶唑-2-在非常温和的条件下生成氧化物(17-91% 产率)。环加成产物的N-脱氧得到二氢-
吡咯并[2,3 -d ]
异恶唑,其精加工产生各种官能化的2,3-二氢
吡咯和
吡咯烷,展示了我们的
吡咯脱芳构化新策略的潜在效用。