36866-68-9Relevant articles and documents
Formal [4 + 1]- and [5 + 1]-annulation by an SN2-conjugate addition sequence: Stereoselective synthesis of highly substituted carbocycles
Tong, Benny Meng Kiat,Chen, Hui,Chong, Sin Yee,Heng, Yi Li,Chiba, Shunsuke
supporting information; experimental part, p. 2826 - 2829 (2012/08/07)
K2CO3-mediated reactions of 6-bromo-2-hexenoates and 7-bromo-2-heptenoate with active methylene compounds deliver highly substituted cyclopentane and cyclohexane derivatives, respectively via a sequence of S N2-conjugate a
An interrupted fischer indolization approach toward fused indoline-containing natural products
Boal, Ben W.,Schammel, Alex W.,Garg, Neil K.
supporting information; experimental part, p. 3458 - 3461 (2009/12/07)
An efficient method to access the fused indoline ring system present in a multitude of bioactive molecules has been developed. The strategy involves the condensation of hydrazines with latent aldehydes to ultimately deliver indoline-containing products by way of an interrupted Fischer indolization sequence. Our studies show that the approach will likely be amenable to the synthesis of complex targets, such as the communesin natural products.
Stereoselective Substitution at Phenyl-Substituted γ-Lactols with Organometallic Compounds
Schmitt, Andreas,Reissig, Hans-Ulrich
, p. 871 - 876 (2007/10/02)
A variety of monosubstituted γ-lactols 4-6 were prepared in good yields by DIBAL reduction of the corresponding γ-lactones 1-3.The monophenyl-substituted lactols 4b-6b were transformed into disubstituted tetrahydrofuran derivatives by replacement of the hydroxyl group by the alkyl residue of organometallic compounds used as nucleophiles.The diastereoselectivity of the substitution was found to depend strongly on the substitution pattern of the γ-lactols.For the reaction of the 3- and 4-substituted derivatives 4b and 5b, respectively, good to excellent trans selectivity was observed, while the 5-substituted derivative reacted without any diastereoselectivity.These results were interpreted by means of the Felkin-Anh model. - Keywords: γ-Lactone / Reduction / γ-Lactol / Lewis acid / Tetrahydrofurans