A Modular, Efficient, and Stereoselective Synthesis of Substituted Piperidin-4-ols
作者:Li Cui、Chaoqun Li、Liming Zhang
DOI:10.1002/anie.201004712
日期:2010.11.22
The pied piper‐idinol of Hamelin: The one‐pot synthesis of piperidin‐4‐ols by sequential gold‐catalyzed cyclization, chemoselective reduction, and spontaneous Ferrier rearrangement has a broad substrate scope and shows excellent diastereoselectivity in the ring‐formation step. This chemistry was employed in the six‐step enantioselective synthesis of (+)‐subcosine II.
Hamelin的pied piper-idinol:通过顺序金催化环化、化学选择性还原和自发费里叶重排一锅法合成哌啶-4-醇具有广泛的底物范围,并在成环步骤中显示出优异的非对映选择性。这种化学反应用于 (+)-亚余弦 II 的六步对映选择性合成。
Hg/Pt-catalyzed conversion of bromo alkynamines/alkynols to saturated and unsaturated γ-butyrolactams/lactones via intramolecular electrophilic cyclization
Convenient and general Hg(II)/Pt(IV) catalyzed syntheses of γ-butyrolactams and α,β-unsaturated γ-butyrolactones/lactams are described via intramolecular electrophilic cyclizations of bromoalkynes with tosylamino and hydroxyl tethers. The reaction features the use of wet solvents, the exclusion of any base and additive, mild conditions and practical yields. We also synthesised few chiral lactams through
A Ru-catalyzed one-pot synthesis of homopropargylic amines from alkyl azides under photolytic conditions
作者:Wook Jeong、Ji Hyung Lee、Jungjoon Kim、Won Jong Lee、Ju-Hwa Seong、Jaiwook Park、Young Ho Rhee
DOI:10.1039/c4ra02941k
日期:——
new synthetic method for homopropargylic amines from alkylazides is presented. A salient feature of this reaction is the involvement of N-unsubstituted imines as the key intermediates, which are generated from alkylazides by Ru catalysis under photolytic conditions. Notably, this method avoids the use of a protective group strategy in the homopropargylic amine synthesis.