Synthesis of carbazoles and dibenzofurans via cross-coupling of o-iodoanilines and o-iodophenols with silylaryl triflates and subsequent Pd-catalyzed cyclization
摘要:
An efficient route to a variety of carbazoles and dibenzofurans has been developed. It involves the reaction of o-iodoanilines or o-iodophenols with silylaryl triflates in the presence of CsF to afford the N- or O-arylated products, which are subsequently cyclized using a Pd catalyst to carbazoles and dibenzofurans in good to excellent yields. By using this methodology, the carbazole alkaloid, mukonine has been synthesized in 76% overall yield in three steps. (c) 2006 Elsevier Ltd. All rights reserved.
In situ Generation and Utilization of CO: An Efficient Route
towards N-Substituted Saccharin via Carbonylative Cyclization of 2-Iodosulfonamides
作者:Bhalchandra Bhanage、Sujit Chavan、Adithyaraj K.
DOI:10.1055/s-0036-1588422
日期:2017.9
The present protocol demonstrates the synthesis of N-substituted saccharines via carbonylative cyclization of 2-iodosulfonamides using a Pd(OAc) 2 /Xantphos catalyst system and phenylformate as a CO source. A variety of saccharin derivatives is synthesized under milder reaction conditions.
本协议演示了使用 Pd(OAc) 2 /Xantphos 催化剂系统和苯甲酸作为 CO 源通过 2-碘磺酰胺的羰基化环化合成 N 取代的糖精。多种糖精衍生物是在较温和的反应条件下合成的。
Combination of FBPase inhibitors and antidiabetic agents useful for the treatment of diabetes
申请人:——
公开号:US20030073728A1
公开(公告)日:2003-04-17
A combination therapy of at least one FBPase inhibitor and at least one other antidiabetic agent is disclosed.
揭示了至少一种FBPase抑制剂和至少一种其他抗糖尿病药物的联合治疗。
Novel aryl fructose-1,6-Bisphosphatase inhibitors
申请人:Metabasis Therapeutics, Inc.
公开号:US20020040014A1
公开(公告)日:2002-04-04
Novel FBPase inhibitors of the formula I
1
are useful in the treatment of diabetes and other conditions associated with elevated blood glucose.
新型的FBPase抑制剂I1式样对于治疗糖尿病和其他与血糖升高相关的疾病非常有用。
Efficient Preparation of ortho-Aminobenzenesulfonamides using Ligand-Free Copper(I)-Catalyzed Amination
A general and efficient method of copper-catalyzed amination of 2-iodobenzenesulfonamide has been developed under very mild conditions, with good to excellent yields. This method uses inexpensive copper(I) iodide as catalyst, readily available 2-iodobenzenesulfonamides and aliphatic amines as the starting materials, and does not require the use of any ligand system or any expensive supplementary additives.
Sulfonamide and Tertiary Amine as Nucleophiles in Pd(II)-Catalyzed Diamination of Alkynes: Synthesis of Tetracyclic Indolobenzothiazine <i>S</i>,<i>S</i>-Dioxides
作者:Tu M. Ha、Bo Yao、Qian Wang、Jieping Zhu
DOI:10.1021/acs.orglett.5b02621
日期:2015.11.6
Pd(II)-catalyzed oxidative double cyclization of the 1,2-diarylethynes bearing an N-methyl-N-(2-methoxycarbonyl)ethylamino and an aminosulfonyl group afforded indolobenzothiazine S,S-dioxides in good to excellent yields. The 2-(methoxycarbonyl)ethyl group attached to the indolyl nitrogen is readily removed under basic conditions (DBU, DMF, 120 °C) to provide the corresponding tetracycles with a free