halides, 2‐haloarylcarboxylic acids, and norbornadiene. The transformation is driven by the direction and subsequent decarboxylation of the carboxyl group, while norbornadiene serves as an ortho‐C−H activator and ethylene synthon via a retro‐Diels–Alder reaction. Comprehensive DFT calculations were performed to account for the catalytic intermediates.
feasible in many cases. The energy transfer (EnT) E/Z-photoisomerization might yield the Z-isomers. In this work, CBZ6 was proven to be an EnT photocatalyst for the E → Z-isomerization of C–C or C–N double bonds. The transformations of in situ generated Z-isomers of oximes and stilbenes consequently afforded the desired reversed Beckmannrearrangement products and phenanthrenes, respectively.
考虑到化学选择性的区域选择性, Z-异构体和E-异构体的反应通常是不同的。 Z-异构体的合成在许多情况下是不可行的。能量转移 (EnT) E / Z光异构化可能会产生Z异构体。在这项工作中, CBZ6被证明是一种用于 C-C 或 C-N 双键E → Z异构化的 EnT 光催化剂。原位生成的肟和茋的Z-异构体的转化因此分别提供了所需的反向贝克曼重排产物和菲。
106. Synthesis of alkylphenanthrenes. Part VI. Attempts to synthesise the hydrocarbon “C<sub>16</sub>H<sub>14</sub>'” derived from strophanthidin
作者:Robert Downs Haworth、Cecil Robert Mavin、George Sheldrick
DOI:10.1039/jr9340000454
日期:——
Colonge; Domenech, Bulletin de la Societe Chimique de France, 1953, p. 289,292