NIR TO SWIR FLUORESCENT COMPOUNDS FOR IMAGING AND DETECTION
申请人:PERKINELMER HEALTH SCIENCES, INC.
公开号:US20190100654A1
公开(公告)日:2019-04-04
This disclosure provides a family of compounds that absorb and fluoresce in the short wave infrared region (SWIR, optionally 1000 nm to 1300 nm), including hydrophilic compounds that exhibit absorption and emission spectral profiles in aqueous solutions substantially similar to those observed in organic solvents such as methanol or DMSO. The compounds can be chemically linked to biomolecules including proteins, nucleic acids, and therapeutic small molecules. The compounds are useful for imaging in a variety of medical, biological and diagnostic applications, including SWIR in vivo imaging of regions of interest within a mammal.
An Unexpected Domino Reaction of β-Keto Sulfones with Acetylene Ketones Promoted by Base: Facile Synthesis of 3(2<i>H</i>
)-Furanones and Sulfonylbenzenes
作者:Wei Tong、Qian-Yu Li、Yan-Li Xu、Heng-Shan Wang、Yan-Yan Chen、Ying-Ming Pan
DOI:10.1002/adsc.201700830
日期:2017.11.23
An unexpected domino reaction of β‐keto sulfones with acetylene ketones has been developed. The domino reaction of β‐keto sulfones with diynones proceeded smoothly in the presence of 30 mol% K2CO3 without other additives, and afforded the novel 3(2H)‐furanone derivatives. On replacing the diynones with terminal alkyne ketones, the reaction regioselectivity was changed and sulfonylbenzenes were obtained
β-酮砜与乙炔酮发生了意想不到的多米诺反应。在没有其他添加剂的情况下,在30 mol%K 2 CO 3的存在下,β-酮砜与二炔酮的多米诺反应顺利进行,得到了新颖的3(2 H)-呋喃酮衍生物。用末端炔烃酮取代二炔酮后,反应区域选择性改变,并通过苯环化获得磺酰苯,收率很高。
The triazolyl analogue of the trityl cation
作者:Mohamed Oukessou、Yves Génisson、Dounia El Arfaoui、Abdeslem Ben-Tama、El Mestafa El Hadrami、Remi Chauvin
DOI:10.1016/j.tetlet.2013.05.138
日期:2013.8
The formation of the tris(3-benzyl-triazol-5-yl)carbenium cation, a heterocyclic analogue of the trityl cation, from tris(3-benzyl-triazol-5-yl)methanol, itself generated by Cu(I)-catalyzed Huisgen reaction of benzyl azide with triethynylmethanol, in the presence of trifluoroacetic anhydride is evidenced through a selective SN1 reactivity with various O-, N-, S-, and C-nucleophiles, giving the corresponding
由三(3-苄基-三唑-5-基)甲醇本身生成的三(3-苄基-三唑-5-基)碳鎓阳离子,三苯甲基阳离子的杂环类似物,本身由Cu(I)-生成在三氟乙酸酐存在下,苄基叠氮化物与三乙炔基甲醇催化的惠斯根反应通过与各种O-,N-,S-和C-亲核试剂的选择性S N 1反应来证明,从而以中等至高收率提供了相应的三唑基甲烷衍生物。
Bistrimethylsilylpropargylic Ether: A Versatile Ambident Synthon to Access Substituted Allenyne Ethers and α-Substituted Bispropargylic Alcohols
5-bis(trimethylsilyl)propargylic ethers 3 towardbases and electrophiles was investigated. Bispropargylic ethers 4, substituted allenyne ethers 6−8, and α-substituted bispropargylic ethers 9 were prepared in good yields, respectively, by protodesilylation, isomerization, or metalation/alkylation of bispropargylic protected alcohol 3. The ambidentbehavior of metalated synthon 3 was discussed and rationalized
propargylation of CoQ0 is described by employing the cooperative effect of Sc(OTf)3 and Hantzschester. It is suggested to work through the redox chain reaction, which involves hydroquinone and dimeric propargylic moiety intermediates. A broad range of propargylic alcohols can be converted into the appropriate derivatives of CoQ0 containing triple bonds in good to excellent yields. The mechanism of the given