The role of cyclobutenes in gold(i)-catalysed skeletal rearrangement of 1,6-enynes
作者:Ana Escribano-Cuesta、Patricia Pérez-Galán、Elena Herrero-Gómez、Masaki Sekine、Ataualpa A. C. Braga、Feliu Maseras、Antonio M. Echavarren
DOI:10.1039/c2ob25419k
日期:——
electron-donating substituents at the alkyne undergo gold(I)-catalysed single cleavage skeletal rearrangement, whereas substrates with electron-withdrawing substituents evolve selectively to double cleavage rearrangement. Theoretical calculations provide a qualitative rationale for these effects, and suggest that bicyclo[3.2.0]hept-5-enes are involved as intermediates. We provide the first X-ray structural evidence
Studies on the Biosynthesis of Taxol: Total Synthesis of Taxa-4(20),11(12)-diene and Taxa-4(5),11(12)-diene. The First Committed Biosynthetic Intermediate
作者:Steven M. Rubenstein、Robert M. Williams
DOI:10.1021/jo00127a029
日期:1995.11
The total synthesis of taxa-4(20),11(12)-diene and taxa-4(5),11(12)-diene is described.
Synthesis of (24R,28R)- and (24S,28S)-24,28-methylene-5-stigmasten-3.beta.-ol and biosynthetic implications of cyclopropyl cleavage to 24-substituted cholesterols
作者:Jose Luis Giner、Mary P. Zimmerman、Carl Djerassi
DOI:10.1021/jo00260a018
日期:1988.12
Isopentenyl diphosphate isomerase. Mechanism of active-site-directed irreversible inhibition by 3-(fluoromethyl)-3-butenyl diphosphate
作者:C. Dale Poulter、Manfred Muehlbacher、Darrell R. Davis