25552-15-2Relevant academic research and scientific papers
A continuous Michael and aldol coupling of α,β-enones catalyzed by iridium complexes
Matsuda, Isamu,Makino, Tatsuya,Hasegawa, Yuki,Itoh, Kenji
, p. 1409 - 1412 (2007/10/03)
Ir[(COD)(PPh3)2]OTf activated by H2 molecule catalyzes Michael-type coupling of α,β-enones with enoxysilanes to give 1,5-dicarbonyl compounds after the subsequent protodesilylation. An identical catalyst system makes it possible to attain a continuous Michael and aldol modification toward α,β- enones in a one-pot operation. (C) 2000 Elsevier Science Ltd.
Novel Method for Generation of an Organotin Enolate by the Cleavage of Diketene with Bis(tributyltin) Oxide, and its Michael Reactions
Shibata, Ikuya,Nishio, Masahiro,Baba, Akio,Matsuda, Haruo
, p. 1067 - 1068 (2007/10/02)
Generation of a novel type of organotin enolate has been accomplished by the regioselective ring cleavage of diketene with bis(tributyltin) oxide; the enolate afforded the first example of Michael addition in reactions using organotin(IV) enolates.
Δ3-DIHYDROPYRANS AND TETRAHYDROPYRANS BY REDUCTION OF PYRYLIUM SALTS WITH SODIUM BOROHYDRIDE IN ACETIC ACID
Balaban, Teodor-Silviu,Balaban, Alexandru, T.
, p. 1341 - 1344 (2007/10/02)
The major reduction products with triacetoxyborohydride (NaBH4 in AcOH) of 2,4,6-trisubstituted pyrylium salts bearing alkyl substituents in the 2- and/or 6-position are the Δ3-dihydropyrans with cis 2- and 6-substituents and all-cis-2,4,6-trisubstituted tetrahydropyrans. Δ3-dihydropyrans are shown to be formed via 2H-pyrans by a 1,4 reduction while tetrahydropyrans result from 4H-pyrans by reduction of both enol-ether double bonds.
