Intramolecular reactivity of functionalized arylcarbenes: 2-allyloxyphenylcarbenes
作者:Frank Gotzhein、Wolfgang Kirmse
DOI:10.1016/s0040-4039(97)00090-7
日期:1997.2
2-Allyloxyphenylcarbenes (8) undergo intramolecular addition (→ 9) and (formal) CH insertion (→ 11) competitively. Stereochemical labels indicate that 11 and major amounts of 9 arise from triplet 8. The intermolecular OH insertion of singlet 8 with methanol (neat) is ca. 50 times faster than intramolecular addition. Under these conditions, intramolecular reactions and intersystem crossing of triplet
2- Allyloxyphenylcarbenes(8)经受分子内加成(→ 9)和(正式)CH插入(→ 11)竞争性。立体化学标记表明,三重态8产生11个和9的大部分。单峰8与甲醇(纯净)的分子间OH插入大约为。比分子内添加快50倍。在这些条件下,分子内反应和三重态的系间窜越8继续进行以相似的速率(ķ Ť〜ķ TS)。