What a relief! In 1955, strainrelease was put forward as a reactivity factor to explain the differing reactivity of axial and equitorial alcohols during oxidation. The same rationale may account for the differing rates of activation between axial and equitorial CH bonds in CHactivation processes (see scheme).
终于解脱了!1955 年,提出应变释放作为反应性因素来解释轴向和等向醇在氧化过程中的不同反应性。相同的基本原理可以解释在 C H 激活过程中轴向和赤道 C H 键之间不同的激活率(参见方案)。
Total Synthesis of (−)‐5‐Deoxyenterocin and Attempted Late‐Stage Functionalization Reactions
作者:Lilla Koser、Thorsten Bach
DOI:10.1002/chem.202301996
日期:2023.10.13
The polyketide natural product (−)-5-deoxyenterocin (2) was stereoselectively synthesized from aldehyde 1, which was in turn obtained from pentane-1,3,5-triol and (−)-menthone. An attempted functionalization at position C5 remained futile, although several C−H activation methods could be successfully applied to (3aR)-(+)-sclareolide (3).