Novel reactions of indium reagents with 1,2-diones: a facile synthesis of α-hydroxy ketones
作者:Vijay Nair、C.N Jayan、Sindu Ros
DOI:10.1016/s0040-4020(01)00937-1
日期:2001.11
Indium mediated reactions of allyl, cinnamyl, propargyl and benzyl bromides, ethyl bromoacetate and ethyl-4-bromocrotonate with 1,2-diones, in the presence of sodium iodide, occur efficiently to afford α-hydroxy keto compounds in excellent yields.
Photo-allylation and photo-benzylation of carbonyl compounds using organotrifluoroborate reagents
作者:Yutaka Nishigaichi、Takayuki Orimi、Akio Takuwa
DOI:10.1016/j.jorganchem.2009.08.011
日期:2009.11
Allyl- and benzyl-trifluoroborates can be applied to the photoreaction of carbonylcompounds to afford the corresponding alcoholic adducts in acceptable yields via a photo-induced single electron transfer pathway. The results were confirmed from the reaction selectivity and the negative free energy change for the electron transfer process.
Remarkable enhancement of photo-allylation of aromatic carbonyl compounds with a hypervalent allylsilicon reagent by donor molecules
作者:Yutaka Nishigaichi、Akira Suzuki、Akio Takuwa
DOI:10.1016/j.tetlet.2006.11.057
日期:2007.1
Photo-allylation of various aromaticcarbonylcompounds with a penta-coordinated allylsiliconate reagent was remarkably accelerated by the addition of a donor molecule. As the oxidation potential of the allylsiliconate was significantly decreased in the presence of a donor molecule, the more efficient photo-induced electrontransfer from the allylsiliconate to the excited substrate was enabled by the
propargylation on corresponding keto-alcohols or by sodiumborohydride mediated reduction of 2-hydroxy-2-propargyl ketones. The furan synthesis proceeded through iodine mediated 5-exo-trig cyclization, dehydration and reductive deiodination. The method was applied to the synthesis of 2-methylfuran fused to phenanthrene, pyrene and acenaphthylene rings.
Synthesis and Characterisation of Bridged Morpholine Derivatives Fused to a Phenanthrene Ring System
作者:H. Surya Prakash Rao、Satish Vijjapu
DOI:10.3184/174751917x14894997017577
日期:2017.4
bridged morpholine derivatives fused to a phenanthrene ring system was prepared in a three-step sequence involving: (i) Voight rearrangement; (ii) stereoselective reduction of ketone and (iii) iodine mediated cyclisation, the α-allyl-α-hydroxy-ketones gave the corresponding bridged N-substituted morpholines. One of the bridged morpholine derivatives fused to a phenanthrene ring system was optically active