[EN] COMPOSITIONS COMPRISING ENZYME CLEAVABLE LINKER PLATFORMS AND CONJUGATES THEREOF<br/>[FR] COMPOSITIONS COMPRENANT DES PLATEFORMES DE LIEURS CLIVABLES PAR UNE ENZYME ET LEURS CONJUGUÉS
申请人:UNIV DANMARKS TEKNISKE
公开号:WO2020260597A1
公开(公告)日:2020-12-30
The present invention relates to a cleavable linker platform. In particular, the invention relates to construction of an enzyme cleavable linker platform conjugated to a drug or a diagnostically relevant compound, a biomolecule, and an enzyme cleavable group, for which cleavage of the enzyme cleavable group leads to release of the drug or diagnostically relevant compound.
Factors in the formation of isomerically and optically pure alkyl halides. Part V. Conditions which determine the formation of 2-halogeno-2-methyl- and 2-halogeno-3-methyl-butanes in the preparation of 1-halogeno-2,2-dimethylpropanes from 2,2-dimethylpropan-1-ol
作者:H. R. Hudson
DOI:10.1039/j29680000664
日期:——
that the preparation of 1-halogeno-2,2-dimethylpropanesfrom the corresponding alcohol may be accompanied by the formation of 2-halogeno-2-methylbutanes and 2-halogeno-3-methylbutanes. The latter are frequently observed in bromide or iodide systems and are thought to result from isomerization of the first formed t-halides. Rearrangements occurring during the reactions of 2,2-dimethylpropan-1-ol with the
Reinvestigation of the SNi reaction. The ionization of chlorosulfites
作者:Peter R. Schreiner、Paul v. R. Schleyer、Richard K. Hill
DOI:10.1021/jo00062a028
日期:1993.5
The decomposition of alkyl chlorosulfites (ROSOCl) has been investigated both computationally and experimentally. Semiempirical (AM1 and PM3) as well as ab initio (HF/3-21G(*), HF/6-31G*, and MP2(full)/6-31G*//MP2(full)/6-31G*) methods were employed, and the results were confirmed experimentally by NMR spectroscopy. The computations indicated that certain alkyl sulfinyl cations (ROSO+) are stable and might be involved in the decomposition of chlorosulfites. Detection of these ions by H-1 and C-13 NMR spectroscopy in polar solvents such as acetone-d6 and acetonitrile-d3 as well as kinetic studies allowed important conclusions to be drawn about the mechanistic details of the S(N)i reaction. We conclude that primary alkyl chlorosulfites ionize to yield a sulfinyl cation (ROSO+) and Cl-, whereas tertiary chlorosulfites preferentially give a carbenium ion and a chlorosulfinyl anion (OSOCl-). The generation of these ion pairs is facilitated in polar solvents where the rates of decomposition of chlorosulfites are largely accelerated. The decomposition of neopentyl chlorosulfite without rearrangement and the substitution at the bridgehead position of 7,7-dimethylbicyclo[2.2.1]-heptyl 1-chlorosulfite show that the loss Of SO2 from ROSO+ must be accompanied by the attack of the chloride ion from the front side.
Gerrard; Nechvatal; Wilson, Journal of the Chemical Society, 1950, p. 2090
作者:Gerrard、Nechvatal、Wilson
DOI:——
日期:——
Verfahren zur Herstellung von 2,2-disubstituierten 3-Chlorpropionsäureestern