reaction between malonate esters and acrolein was developed to access complex polycyclic systems. This novel tandem reaction enables the simultaneous generation of up to seven new bonds and at least three new stereogenic centers. Mechanistic studies indicate a series of nucleophilic 1,4 and 1,6 Michael addition reactions occur, followed by an aldol condensation reaction, culminating in the formation of three
N-Heterocyclic Carbene-Catalyzed Michael Additions of 1,3-Dicarbonyl Compounds
作者:Thomas Boddaert、Yoann Coquerel、Jean Rodriguez
DOI:10.1002/chem.201002538
日期:2011.2.11
A study of the organocatalyticactivity of N‐heterocyclic carbenes (NHCs) in the Michaeladdition of 1,3‐dicarbonyl compounds has allowed us to identify 1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene (IPr) as an excellent catalyst for this transformation (up to 99 % yield with a 2.5 mol % catalyst loading), and the reaction was found to be of broad scope. Two early applications of this unprecedented
4,4-disubstituted cyclohexyl bridged heptamethine cyanine dyes and uses thereof
申请人:VisEn Medical, Inc.
公开号:US11193932B2
公开(公告)日:2021-12-07
The invention relates to a family of compounds that comprise fluorescent cyanine dyes. The compounds are near infrared absorbing heptamethine cyanine dyes with a 4,4-disubstituted cyclohexyl ring as part of the polymethine chromophore. The compounds are generally hydrophilic and can be chemically linked to biomolecules, such as proteins, nucleic acids, and therapeutic small molecules. The compounds can be used for imaging in a variety of medical, biological and diagnostic applications.
4,4-DISUBSTITUTED CYCLOHEXYL BRIDGED HEPTAMETHINE CYANINE DYES AND USES THEREOF
申请人:VisEn Medical, Inc.
公开号:EP3489309A1
公开(公告)日:2019-05-29
The invention relates to a family of compounds that comprise fluorescent cyanine dyes. The compounds are near infrared absorbing heptamethine cyanine dyes with a 4,4-disubstituted cyclohexyl ring as part of the polymethine chromophore. The compounds are generally hydrophilic and can be chemically linked to biomolecules, such as proteins, nucleic acids, and therapeutic small molecules. The compounds can be used for imaging in a variety of medical, biological and diagnostic applications.