Synthesis of Highly Substituted Phenols and Benzenes with Complete Regiochemical Control
作者:Xiaojie Zhang、Christopher M. Beaudry
DOI:10.1021/acs.orglett.0c02157
日期:2020.8.7
Substitutedphenols are requisite molecules for human health, agriculture, and diverse synthetic materials. We report a chemical synthesis of phenols, including penta-substituted phenols, that accommodates programmable substitution at any position. This method uses a one-step conversion of readily available hydroxypyrone and nitroalkene starting materials to give phenols with complete regiochemical
A General Synthetic Method for α-Methylene Compounds by the Palladium-Catalyzed Decarboxylation-Deacetoxylation of Allyl α-Acetoxymethylcarboxylates Substituted by an Electron-Withdrawing Group at α-position
作者:Jiro Tsuji、Mohammad Nisar、Ichiro Minami
DOI:10.1246/cl.1987.23
日期:1987.1.5
Allyl α-acetoxymethylcarboxylates substituted by ester, amide, nitro, cyano, and sulfonyl groups at α-position undergo smooth palladium-catalyzed decarboxylation-deacetoxylation under mild neutral conditions to afford corresponding α-methylene compounds in high yields.
An Expedient Synthesis of α,β-Unsaturated Ketones Using Nitroalkenes and Sulfones
作者:Bahlul Z. Awen、Masaaki Miyashita、Tomonori Shiratani、Akira Yoshikoshi、Hiroshi Irie
DOI:10.1246/cl.1992.767
日期:1992.5
A facile synthesis of various substituted α,β-unsaturated ketones utilizing nitroalkenes and sulfones are described, in which conjugate addition of sulfonyl carbanions to nitroalkenes, ozonolysis or acid treatment of the resulting lithium nitronates, and subsequent elimination of sulfinic acid from keto sulfones by DBU are involved.
Disclosed herein are embodiments of a method for making substituted compounds with specific and selectable regiochemistry. Also disclosed are compounds made by the method. The method may comprise contacting a compound having a formula I
with a compound according to formula II
in the presence of a Lewis acid to form a phenol compound according to formula III and/or a benzofuranone compound according to formula IV
本文公开了一种制造具有特定和可选择区域化学性质的取代化合物的方法的实施例。还公开了用该方法制得的化合物。该方法可包括将具有式 I 的化合物
与根据式 II 的化合物接触
在路易斯酸存在下,生成根据式 III 的苯酚化合物和/或根据式 IV 的苯并呋喃酮化合物
Blomquist; Shelley, Journal of the American Chemical Society, 1948, vol. 70, p. 148