Azomethine ylide generation via the dipole cascade
作者:Albert Padwa、Dennis C. Dean、Donald L. Hertzog、William R. Nadler、Lin Zhi
DOI:10.1016/s0040-4020(01)90369-2
日期:1992.9
of the α-diazoketone was blocked with two methyl groups, the rhodium(II)-catalyzedcycloaddition with dimethyl acetylenedicarboxylate led to the carbonyl vlide cycloadduct in high yield. MNDO calculations show that the cyclic carbonyl ylide derived from ethyl 2-diazo-4-dibenzoylamino-3-oxobutyrate is 3.3 kcal lower in its heat of formation than the corresponding azomethine ylide. This thermodynamic
Safety as a Factor in Reaction Development: Considerations of Sensitization Potential with Amide Bond Forming Reagents
作者:David T. George、Michael J. Williams、Gregory L. Beutner
DOI:10.1002/hlca.202300140
日期:2023.11
amide bond forming agents, a detailed toxicological analysis of this broad family of reagents was undertaken which led to a quantitative ranking of the sensitization potential of these commonly used compounds. This data enables occupational toxicologists to guide the safer use of these reagents in the laboratory, but it also provides an opportunity for chemists working on reaction development, optimization