Seven-membered cyclic α-monofluorophosphonate esters such as 2-allyloxy-3-fluoro-3-phenylthio-4,7-dihydro-[1, 2]-oxaphosphinine-2-oxide were successfully synthesized in moderate total yield as 41% from open-chain allyl phosphonates having an α-arylthio group as an electroauxiliary using an alternative sequence of anodic fluorination and ring-closing olefin metathesis (RCM). On the other hand, in an
Conjugate addition reactions of .alpha.,.beta.-unsaturated ketones with higher order, mixed organocuprate reagents, R2Cu(CN)Li2
作者:Bruce H. Lipshutz、Robert S. Wilhelm、Joseph A. Kozlowski
DOI:10.1021/jo00195a010
日期:1984.10
Discovery of Vinyl Sulfones as a Novel Class of Neuroprotective Agents toward Parkinson’s Disease Therapy
作者:Seo Yeon Woo、Ji Hyun Kim、Mi Kyeong Moon、Se-Hee Han、Seul Ki Yeon、Ji Won Choi、Bo Ko Jang、Hyo Jung Song、Yong Gu Kang、Jin Woo Kim、Jaeick Lee、Dong Jin Kim、Onyou Hwang、Ki Duk Park
DOI:10.1021/jm401788m
日期:2014.2.27
Although the etiology of Parkinson's disease (PD) remains elusive, recent studies suggest that oxidative stress contributes to the cascade leading to dopaminergic (DAergic) neurodegeneration. The Nrf2, signaling is the main pathway responsible for cellular defense system against oxidative stress. Nrf2 is a transcription factor that regulates environmental stress response by inducing expression of antioxidant enzyme genes. We have synthesized novel vinyl sulfone derivatives. They exhibited a broad range of activities in inducing HO-1, whose gene expression is under the control of Nrf2. Among them, compound 12g was confirmed to activate Nrf2 and induce expression of the Nrf2-dependent antioxidant enzymes NQO1, GCLC, GLCM, and HO-1, at both mRNA and protein levels in DAergic neuronal cells. This was accompanied by protection of DAergic neurons in both in vitro and MPTP-induced in vivo models of PD. In addition, compound 12g effectively resulted in attenuation of the PD-associated behavioral deficits in the mouse model.
New synthetic method of o,s-thioacetals of formylphosphonates
作者:Hyeon Kim Taek、Young Oh Dong
DOI:10.1016/s0040-4039(00)98669-6
日期:1985.1
KIM, TAEK, HYEON;UH, DONY, YOUNG, TETRAHEDRON LETT., 1985, 26, N 29, 3479-3482