新型 2-(het) 芳基取代的噻唑并稠合六元和七元杂环化合物的合成,例如噻唑并[4,5 - b ]吡啶-5(4 H )-酮、噻唑并[4,5 - c ] isoquinolin-5(4 H )-ones, thiazolo[4,5- b ]quinolin-9(4 H )-ones, 4 H- benzo[ e ]thiazolo[4,5- b ]azepine-5,10-diones ,已通过原位生成的 2-(het)aryl-4-amino-5-functionalized 噻唑的分子内异环化在单锅操作中开发。这些 4-氨基-5-官能化噻唑很容易在一锅法中获得,方法是在 NaH 存在下用氰胺处理一系列(杂)芳基二硫酯,然后原位所得硫代亚胺酸盐与合适的活化二卤代甲烷的S-烷基化-分子内缩合。另一方面,相应的 4 H-苯并[ b ]噻唑并[4,5 - e ][1,4]diazepin-10(9
Single-Pot Preparation of 4-Amino-2-(het)aryl-5-Substituted Thiazoles Employing Functionalized Dithioesters as Thiocarbonyl Precursors
作者:Anusha Avadhani、Pethaperumal Iniyavan、Yogendra Kumar、Hiriyakkanavar Ila
DOI:10.1021/acs.joc.1c00616
日期:2021.6.18
4-amino-2-(het)aryl/alkyl-5-functionalized thiazoles has been disclosed, utilizing aryl/heteroaryl/alkyl dithioesters as thiocarbonyl coupling partners in a modified Thorpe–Ziegler type cyclization. The reaction proceeds at room temperature, under mild conditions, in excellent yields, displaying broad functional group compatibility at 2 and 5 positions of thiazoles. This synthetic strategy has been further
Reaction of 1,3-Bis(het)arylmonothio-1,3-diketones with Sodium Azide: Regioselective Synthesis of 3,5-Bis(het)arylisoxazoles via Intramolecular N–O Bond Formation
作者:Mary Antony P、Gantala L. Balaji、Pethaperumal Iniyavan、Hiriyakkanavar Ila
DOI:10.1021/acs.joc.0c02216
日期:2020.12.4
An efficient newsynthesis of 3,5-bis(het)arylisoxazoles, involving the reaction of 1,3-bis(het)arylmonothio-1,3-diketones with sodiumazide in the presence of IBX catalyst, has been reported. The reaction proceeds at room temperature in high yields and is applicable to a broad range of substrates including the synthesis of 5-methyl-3-arylisoxazoles, a key subunit present in several β-lactamase-resistant
Facile Conversion of Dithioesters
into Carboxylic Acids or Esters Using Alkaline Hydrogen
Peroxide
作者:Fabienne Grellepois、Charles Portella
DOI:10.1055/s-0028-1083190
日期:——
Simple, mild, and environmentally friendly procedures for the directconversion of dithioesters into either carboxylicacids or esters using hydrogen peroxide under alkaline conditions are described.
Synthesis of novel
<scp>9‐amino</scp>
/aryl/oxo‐2‐(het)arylthiazolo[4,5‐
<i>b</i>
]quinolines via palladium catalyzed
<i>N</i>
<scp>‐arylation</scp>
‐cyclization protocol
作者:Pethaperumal Iniyavan、Anusha Avadhani、Yogendra Kumar、Arkalagud Satyanarayana Jeevan Chakravarthy、Mary Antony Palluruthiyil、Hiriyakkanavar Ila
DOI:10.1002/jhet.4554
日期:2022.12
An efficient approach for the facile synthesis of novel hitherto unexplored 2-(het)aryl-9-amino/aryl-thiazolo[4,5-b]quinolines and the corresponding thiazolo[4,5-b]quinolin-9(4H)-ones via synthetic elaboration of 2-substituted-4-amino-5-cyano/aroyl/carboethoxy thiazoles have been developed. The overall strategy involves palladium catalyzed N-arylation of these 4-aminothiazoles to the corresponding
一种简便合成新型 2-(het)aryl-9-amino/aryl-thiazolo[4,5- b ]quinolines 和相应的 thiazolo[4,5 - b ]quinolin-9(4 H ) 的有效方法)-ones 通过 2-substituted-4-amino-5-cyano/aroyl/carboethoxy thiazoles 的合成加工开发。总体策略涉及钯催化的这些 4-氨基噻唑的 N-芳基化为相应的 4-( N-芳基)噻唑,以及它们随后的三氟甲磺酸介导的分子内环缩合为目标化合物。这种新的和直接的协议显示了广泛的底物范围,适用于 9-氨基/芳基和 9-(4 H)来自相应 5-氰基/芳酰基/乙氧基噻唑的喹诺酮,收率良好。