bonds has been accomplished through radical translocation and cross-coupling. Upon irradiation with visible light, copper-based photocatalyst [Cu(Xantphos)(dmp)]BF4 enabled cross-coupling of N-alkoxyphthalimides with amino acid esters or amino acids to provide δ-C(sp3)–H alkylated alcohols (31 examples, up to 92% yield) with additive BNDHP or α-C(sp3)–H alkylated alcohols (18 examples, up to 86% yield)
Ligand‐Enabled β‐Methylene C(sp
<sup>3</sup>
)−H Arylation of Masked Aliphatic Alcohols
作者:Guoqin Xia、Zhe Zhuang、Luo‐Yan Liu、Stuart L. Schreiber、Bruno Melillo、Jin‐Quan Yu
DOI:10.1002/anie.202000632
日期:2020.5.11
salicylic-aldehyde-derived L,X-type directing group with an electron-deficient 2-pyridone ligand to enable the β-methylene C(sp3 )-H arylation of aliphaticalcohols, which has not been possible previously. Notably, this protocol is compatible with heterocycles embedded in both alcohol substrates and aryl coupling partners. A site- and stereo-specific annulation of dihydrocholesterol and the synthesis of a key
Selective introduction of fluorine into molecules by the cleavage of inert C−H bonds is of central academic and synthetic interest, yet remains challenging. Given the central role of alcohols in organic chemistry as the most ubiquitous building blocks, a versatile and selectiveC(sp3)−H and C(sp2)−H fluorination of simple alcohols, enabled by novel designed exo‐directing groups, is described. C(sp2)−H
A new class of chemical compounds and their process of preparation is described. These compounds have valuable properties as anti-secretory, anti-spasmodic, anti-ulcerogenic and anti-diarrheal agents.
描述了一类新的化合物及其制备过程。这些化合物具有抗分泌、抗痉挛、抗溃疡和抗腹泻剂的有价值的性质。
Method for treatment of gastrointestinal secretory and ulcerogenic
申请人:William H. Rorer, Inc.
公开号:US04169155A1
公开(公告)日:1979-09-25
A new class of chemical compounds and their process of preparation is described. These compounds have valuable properties as anti-secretory, anti-spasmodic, anti-ulcerogenic and anti-diarrheal agents.