Molecules labeled with fluorine-18 (18F) are used in positron emission tomography to visualize, characterize and measure biological processes in the body. Despite recent advances in the incorporation of 18F onto arenes, the development of general and efficient approaches to label radioligands necessary for drug discovery programs remains a significant task. This full account describes a derisking approach
Efficient copper-catalyzed cross-coupling of 1-Boc-piperazine with aryl iodides and its application in the synthesis of trazodone
作者:Fui-Fong Yong、Yong-Chua Teo、Khee-Ngiap Tan
DOI:10.1016/j.tetlet.2013.07.104
日期:2013.9
convenient and practical strategy is developed for the cross-coupling of N-Boc protected piperazines with aryliodides using CuBr/1,1′-bi-2-naphthol as the catalyst and K3PO4 as the base. The protocol affords N-arylated piperazine products in moderate to good yields under the optimized conditions. The application of this catalytic system to the synthesis of trazodone is also successfully demonstrated using commercially
提出了一种方便实用的策略,以CuBr / 1,1'-bi-2-萘酚为催化剂,K 3 PO 4为碱,将N - Boc保护的哌嗪与芳基碘交叉偶联。该协议在优化条件下以中等到良好的产率提供了N-芳基哌嗪产品。使用市场上可买到的底物也成功地证明了该催化体系在合成曲唑酮中的应用。
7-벤질-4(4-페닐피페라진-1-일)-7H-피롤로[2,3-d]피리미딘 유도체 및 이를 유효성분으로 함유하는 피부 미백용 조성물 및 멜라닌 색소 과다 침착 질환의 예방 또는 치료용 약학적 조성물
申请人:KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY 한국화학연구원(319980077651)
公开号:KR20200104476A
公开(公告)日:2020-09-04
7-벤질-4(4-페닐피페라진-1-일)-7H-피롤로[2,3-d]피리미딘 유도체 및 이를 유효성분으로 함유하는 피부 미백용 조성물에 관한 것으로, 상기 유도체는 적은 양을 사용하여도 멜라닌의 생성을 억제하는 효과를 나타내므로, 이를 멜라닌 색소 과다 침착 질환의 예방 또는 치료용 약학적 조성물, 피부 미백용 화장료 조성물 및 피부 미백용 건강기능 식품으로 유용하게 사용할 수 있다.
Quantum dot gels as efficient and unique photocatalysts for organic synthesis
作者:Daohua Liu、James Nyakuchena、Rajendra Maity、Xin Geng、Jyoti P. Mahajan、Chathurange C. Hewa-Rahinduwage、Yi Peng、Jier Huang、Long Luo
DOI:10.1039/d2cc03872b
日期:——
Here we report CdS quantum dot (QD) gels as highly efficient and unique photocatalysts for organicsynthesis. We found that the photocatalytic activity of CdS QD gel was superior to phosphine oxide- and thiolate-capped CdS QDs for dehalogenation and α-amine arylation reactions because of the high accessibility of its surface sites to the substrates. In addition, we discovered the unique reactivity