Synthesis of 3-(aminomethyl)pyridine by traceless C3-selective umpolung of 1-amidopyridin-1-ium salts
作者:Pingsheng Tang、Dehai Xiao、Bo Wang
DOI:10.1039/c6cc09582h
日期:——
A natural product inspired rapid access of 3-(aminomethyl)pyridine by one-pot reaction of 1-amidopyridin-1-ium salt with aminal followed by reductive cleavage of the N-N bond is developed. This C3-selective formal C-H...
Silver-catalyzed nucleophilic substitution of aminals with ethyl diazoacetate: a new pathway to β-amino-α-diazoesters
作者:Jiawen Li、Guiping Qin、Hanmin Huang
DOI:10.1039/c6ob02136k
日期:——
A novel silver-catalyzed nucleophilicsubstitution of aminals with ethyl diazoacetate producing β-amino-α-diazoesters has been developed. A series of aminals with different amino moieties and substituents were successfully incorporated in this reaction, which delivered a wide range of β-amino-α-diazocarbonyl compounds in the presence of a lower catalyst loading in 2 hours.
New α-phosphono-β-aryl- or β-heteroaryl-substituted α,β-unsaturated dithioesters 2 were easily prepared from diethyl phosphonodithioacetate 1 and used as thiadienes in thermal or highpressure hetero Diels–Alder cycloadditions with enol and thioenol ethers. The resulting new phosphono 3,4-dihydro 2H-thiopyrans 3 were isolated in excellent yields and with a cis- or trans-diastereoselectivity depending