نتایج جستجو برای: aza cope rearrangement
تعداد نتایج: 64605 فیلتر نتایج به سال:
David Cope and Experiments in Musical Intelligence
The aza-Morita-Baylis-Hillman (azaMBH) reaction has been studied for electronically and sterically deactivated Michael acceptors. It is found that electronically deactivated systems can be converted with electron-rich phosphanes and pyridines as catalysts equally well. For sterically deactivated systems clearly better catalytic turnover can be achieved with pyridine catalysts. This is in accord...
8-Aza-Hr,2 synthesized initially by Davoll (12), has antitu mon activity in experimental systems and differs in its me tabolism from such closely related compounds as inosine and 6-thioinosine (10). In a preliminary study of the metabo lism of [3H]-8-aza-HR, we found conversion to phosphates of 8-aza-AR (2). Although 8-aza-AR was synthesized some years ago (12), little is known about its metabo...
The current study was to investigate whether embryo or fetal fibroblast cells treated with 5-aza-2’-deoxyctidine (5-aza-dC) have a positive effect on the in vitro development of porcine parthenogenetic and cloned embryos. To this end, porcine fetal fibroblast cells were treated with different concentrations (5 nM, 50 nM and 500 nM) of 5-aza-dC for different exposure times (1, 6 and 20 hours), t...
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