Synthese de composes dihydro-2,3 furanniques par hydroboration d'alcools β-acetyleniques
作者:Gilbert Dana、Bruno Figadère、Estera Touboul
DOI:10.1016/s0040-4039(01)80919-9
日期:1985.1
Hydroboration of β-acetylenic alcohols followed by NaOH/H2O2 oxidation leads to hemiacetals of γ-aldols which are easily dehydrated to 2,3-dihydrofuran compounds. The reaction gives good yields with hindered alcohols and its stereochemistry may be controlled during the organometallic synthesis of the starting alcohol.
β-炔醇的硼氢化反应,然后进行NaOH / H 2 O 2氧化,导致生成的γ-醛缩醛半缩醛容易脱水成2,3-二氢呋喃化合物。该反应在受阻醇的作用下具有良好的收率,并且可以在起始醇的有机金属合成过程中控制其立体化学。
Efficient, Stereodivergent Access to 3-Piperidinols by Traceless P(OEt)<sub>3</sub> Cyclodehydration
作者:Peter H. Huy、Ari M. P. Koskinen
DOI:10.1021/ol4026588
日期:2013.10.18
A stereodivergent and highly diastereoselective (dr up to >19:1 for both isomers), step economic (5-6 steps), and scalable synthesis (up to 14 g) of cis- and trans-2-substituted 3-piperidinols, the core motif of numerous bioactive compounds, providing efficient access to the NK-1 inhibitor L-733,060 is presented. Additionally, a "traceless" (referring to the simplified byproduct separation) cyclodehydration realizing simple P(OEt)(3) as a substitute for PPh3 is developed.
DANA, G.;FIGADERE, B.;TOUBOUL, E., TETRAHEDRON LETT., 1985, 26, N 46, 5683-5684
作者:DANA, G.、FIGADERE, B.、TOUBOUL, E.
DOI:——
日期:——
A PROCESS FOR THE PRODUCTION OF CYCLIC SULFONIUM SALTS