Photoisomerisation of (E)- to (Z)-N,N-dimethylhydrazones and thermal reversion
作者:Leo F. Clarke、Fiona O'Sullivan、Anthony F. Hegarty
DOI:10.1039/p29910001649
日期:——
E-isomers of aliphatic aldehyde N,N-dimethylhydrazones undergo competing E to Z isomerisation and photolysis to nitriles under UV (254 nm) irradiation. The Z–E isomer mixture which results thermally reverts to the more stable E-isomer and under short irradiation times the photoisomerisation/thermal reversion cycle can be reversible. Trimethylacetaldehyde N,N-dimethylhydrazone undergoes similar reactions (ruling
脂肪醛N,N-二甲基hydr的E-异构体在UV(254 nm)辐射下经历竞争性E - Z异构化和光解成腈。所述ž - ë异构体混合物,这导致热恢复到更稳定的È异构体和下短的辐照时间的光异构化/热循环逆转可以是可逆的。三甲基乙醛N,N-二甲基hydr经历相似的反应(排除其他类型的异构化的干预),RCH的热Z → E反应速率N–NMe 2的顺序为R = Bu t > Et> Me。根据the的构象和E - Z异构化的机理来考虑结果。
MESOSCOPIC MATERIALS COMPRISED OF ORDERED SUPERLATTICES OF MICROPOROUS METAL-ORGANIC FRAMEWORKS
申请人:The Regents of the University of California
公开号:US20170081346A1
公开(公告)日:2017-03-23
The disclosure provides for MOF heterolites comprised of ordered superlattices of MOFs, the manufacture thereof, and the use of the MOF heterolites for various applications, such as gas separation and/or storage, catalysis, light harvesting, and meta-materials.
METAL ORGANIC FRAMEWORKS COMPRISING A PLURALITY OF SBUS WITH DIFFERENT METAL IONS AND/OR A PLURALITY OF ORGANIC LINKING LIGANDS WITH DIFFERENT FUNCTIONAL GROUPS
申请人:The Regents of the University of California
公开号:US20170101429A1
公开(公告)日:2017-04-13
The disclosure provides for metal organic frameworks (MOFs) which comprise a plurality of SBUs comprising different metals or metal ions and/or a plurality of organic linking moieties comprising different functional groups.
Reaction of the lithio-derivative of methoxyallene with hydrazones. Part 1: Synthesis and transformation of α-allenyl hydrazines
作者:Valérie Breuil-Desvergnes、Jacques Goré
DOI:10.1016/s0040-4020(01)00030-8
日期:2001.3
methoxyallene reacts with aldehyde hydrazones leading to expected α-allenyl hydrazines when ether is the solvent of the reaction. The yields are good as well as the diastereoselectivity observed in the case of SAMP-hydrazones. These hydrazines are cleanly transformed to N-dialkylamino-3-methoxy-3-pyrrolines when they are reacted with n-BuLi in THF. These compounds are sometimes accompanied by the isomeric
An elimination reaction of N-carbomethoxy-N,N-dimethylhydrazonium salts to alkyl nitriles
作者:Zejun Xiao、Jack W. Timberlake
DOI:10.1016/s0040-4020(98)00787-x
日期:1998.10
A new kind of elimination of hydrazonium salts to alkyl nitriles has been developed. The reaction of hydrazones and chloroformates results in the formation of hydrazonium salts, which react in situ with water to afford alkyl nitriles. The elimination is adapted to a range of solvents and gives good yields of α-secondary and tertiary alkyl-substituted nitriles.