四氢-1,5-苯并reaction庚因和四氢-1 H -1,5-苯并二氮杂通过串联还原-还原胺化反应
摘要:
串联还原-还原胺化反应已用于合成(±)-4-烷基-2,3,4,5-四氢-1,5-苯并x氮平和(±)-4-烷基-1-苯甲酰基- 2,3,4,5-四氢-1 H -1,5-苯并二氮杂s。通过用2-氟-1-硝基苯将几种3-丁烯-1-醇衍生物中的醇盐进行亲核芳族取代,然后进行臭氧分解,可制备1,5-苯并x杂庚环闭环所需的硝基醛和酮。1,5-苯并二氮杂卓的前体是通过类似地添加N来制备的-(3-丁烯基)苯甲酰胺阴离子生成2-氟-1-硝基苯,然后进行臭氧分解。然后使用5%钯碳的甲醇溶液催化硝基羰基化合物的加氢反应,然后通过串联还原-还原胺化顺序得到目标杂环。色谱纯化后,高产率地分离出1,5-苯并x氮平。直接从氢化混合物中分离出固体形式的1,5-苯并二氮杂并在两个氮原子上具有不同的官能度。
四氢-1,5-苯并reaction庚因和四氢-1 H -1,5-苯并二氮杂通过串联还原-还原胺化反应
摘要:
串联还原-还原胺化反应已用于合成(±)-4-烷基-2,3,4,5-四氢-1,5-苯并x氮平和(±)-4-烷基-1-苯甲酰基- 2,3,4,5-四氢-1 H -1,5-苯并二氮杂s。通过用2-氟-1-硝基苯将几种3-丁烯-1-醇衍生物中的醇盐进行亲核芳族取代,然后进行臭氧分解,可制备1,5-苯并x杂庚环闭环所需的硝基醛和酮。1,5-苯并二氮杂卓的前体是通过类似地添加N来制备的-(3-丁烯基)苯甲酰胺阴离子生成2-氟-1-硝基苯,然后进行臭氧分解。然后使用5%钯碳的甲醇溶液催化硝基羰基化合物的加氢反应,然后通过串联还原-还原胺化顺序得到目标杂环。色谱纯化后,高产率地分离出1,5-苯并x氮平。直接从氢化混合物中分离出固体形式的1,5-苯并二氮杂并在两个氮原子上具有不同的官能度。
Zirconium(IV)- and Hafnium(IV)-Catalyzed Highly Enantioselective Epoxidation of Homoallylic and Bishomoallylic Alcohols
作者:Zhi Li、Hisashi Yamamoto
DOI:10.1021/ja100951u
日期:2010.6.16
enantioselective epoxidation of homoallylic alcohols and bishomoallylic alcohols, which used to be quite difficult substrates for other types of asymmetricepoxidation reactions. The performance of the catalyst was improved by adding polar additive and molecular sieves. For homoallylic alcohols, the reaction could provide epoxy alcohols in up to 83% yield and up to 98% ee, while, for bishomoallylic alcohols, up
Thermoinduced Radical Cyclization for the Synthesis of Sultines
作者:Zhiming Zhu、Zhengxi Deng、Chenglong Xuan、Chao Shu
DOI:10.1021/acs.orglett.3c04099
日期:2024.1.12
A thermoinduced radical homolytic substitution cyclization of alkenyl tethered sulfinate esters was displayed under mild metal-free conditions, enabling the functionalization of alkenes and leading to structurally diverse value-added sultine products. The process utilizes readily available substrates using inexpensive 5% benzoyl peroxide (BPO) as an initiator to generate functionalized sultines with