On the loss of a benzyl radical from the molecular ion of α,ω -dibenzyloxyalkanes
作者:A.P. Bruins、N.M.M. Nibbering
DOI:10.1016/s0040-4020(01)97030-9
日期:1974.1
The molecularions of the title compounds appear to lose a benzyl radical, which must be due to the presence of two benzyloxy groups, as benzylalkyl ethers do not exhibit such an expulsion upon electron impact. The results of the partition of the labels deuterium and 18O in the ions m/e 107 (protonated benzaldehyde) and [M-benzyl-benzaldehyde]+ put forward evidence that this process is initiated by
标题化合物的分子离子似乎丢失了苄基,这必须归因于两个苄氧基的存在,因为苄基烷基醚在电子撞击时不会表现出这种驱逐作用。标记氘和18 O在离子m / e 107(质子化的苯甲醛)和[M-苄基-苯甲醛] +中的分配结果表明,该过程是由苄基H原子连续迁移至在S N i型反应中,醚的功能相反,苄基阳离子从该质子化的O原子转移至不带电荷的O原子(参见方案5)。
Inhibition of Matrix Metalloproteinases by Hydroxamates Containing Heteroatom-Based Modifications of the P1' Group
作者:Madhusudhan R. Gowravaram、Jeffrey S. Johnson、Daniel Delecki、Ewell R. Cook、Bruce E. Tomczuk、Arup K. Ghose、Alan M. Mathiowetz、John C. Spurlino、Byron Rubin、Douglas L. Smith、Tricia Pulvino、Robert C. Wahl
DOI:10.1021/jm00014a010
日期:1995.7
In this study, structure-based drug design of matrix metalloproteinase inhibitors [human fibroblast collagenase (HFC), human fibroblast stromelysin (HFS), and human neutrophil collagenase (HNC)] was utilized in the development of potent hydroxamates which contain novel, heteroatom-based modifications of the P-1' group. A series containing a P-1' butyramide group resulted in a nanomolar potent and selective HNC inhibitor as well as a dual HFS/HNC inhibitor. Benzylic others with a four- or five-carbon methylene linker in the P-1' position also produced nanomolar potent HFS/HNC inhibition and micromolar potent HFC inhibition as expected. Surprisingly, the phenolic ethers of the same overall length as the benzylic ethers showed nanomolar potencies against HFC, as well as HFS and HNC. The potency profile of the phenolic ethers was optimized by structure-activity relationships of the phenolic group and the C-terminal amide. These inhibitors may help elucidate the in vivo roles of matrix metalloproteinases in normal and disease states.
Monobenzylation Of 1,<i>n</i>-Diols via Dibutylstannylene Intermediates
作者:Eugene A. Mash、Liza T. A. Kantor、Stephen C. Waller
DOI:10.1080/00397919708006052
日期:1997.2
Symmetrical primary 1,n-diols, HO(CH2)(n)OH, of any chain length from n = 2-10, can be selectively monobenzylated via sequential treatment with dibutyltin oxide and benzyl bromide.
Edelson-Averbukh, Marina; Etinger, Alexander; Mandelbaum, Asher, Journal of the Chemical Society. Perkin Transactions 2 (2001), 1999, # 6, p. 1095 - 1105