Fluorinated 1-Phenyl-1<i>H</i>-tetrazol-5-yl Sulfone Derivatives as General Reagents for Fluoroalkylidene Synthesis
作者:Arun K. Ghosh、Barbara Zajc
DOI:10.1021/jo901313k
日期:2009.11.20
Julia−Kocienski olefination reagents 1-fluoropropyl, (cyclopropyl)fluoromethyl, 1-fluoro-2-methyl-2-propenyl, and 1-fluoro-5-hexenyl 1-phenyl-1H-tetrazol-5-yl (PT) sulfones were prepared by metalation followed by electrophilic fluorination. Although metalation−fluorination of n-propyl, 5-hexenyl, and (cyclopropyl)methyl PT-sulfones proceeded under homogeneous conditions, fluorination of 2-methyl-2-propenyl
Practical Synthesis of β-Acyl and β-Alkoxycarbonyl Heterocyclic Sulfones
作者:Jiří Pospíšil、Hitoshi Sato
DOI:10.1021/jo102326p
日期:2011.4.1
A short and efficient synthesis for beta-acyl and beta-alkoxycarbonyl heterocyclic sulfones containing benzothiazol (BT) and phenyltetrazol (PT) heterocydic core is presented here. The method seems to be general and provides the desired C-nudeophiles in very good to excellent yields from readily available starting materials.
Relay ring-closing metathesis strategies towards the synthesis of the ABC tricycle of Taxol
tricycle of Taxol are presented. They both involve a relay ring-closingmetathesis reaction to make the central B ring in a convergent fashion. In the first approach, the extender arm is positioned on the A ring, and the C ring bears the relay tether in the second route. Metathesis precursors with diverse extender arms were efficiently synthesised; unfortunately, the crucial metathesis reactions failed
介绍了两种合成紫杉醇 ABC 三轮车的路线。它们都涉及中继闭环复分解反应,以使中央 B 环以收敛的方式。在第一种方法中,延长臂位于 A 环上,而 C 环在第二种路线中承载中继系绳。高效合成了具有多种扩展臂的复分解前体;不幸的是,关键的复分解反应在所有情况下都未能提供目标化合物。
A direct and efficient preparation of 1-phenyltetrazol-5-yl sulfides from alcohols
作者:Adam R. Ellwood、Michael J. Porter
DOI:10.1039/c0ob00863j
日期:——
Treatment of primary or secondary alcohols with 1-phenyl-1(H)-tetrazole-5-thiol and [Me2NCHSEt]+ BF4− leads directly and cleanly to 1-phenyl-1(H)-tetrazol-5-yl sulfides.