24小时热门版块排行榜    

查看: 3315  |  回复: 11
本帖产生 1 个 BM-EPI ,点击这里进行查看
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

yuzaifei

新虫 (小有名气)

[求助] 谷胱甘肽在二甲亚砜中还有对二硫键的还原作用吗?

还原型谷胱甘肽在水中有对二硫键的还原作用,我现在想把这个还原反应转移到二甲亚砜体系中,不晓得还能不能发挥这种作用,特来请教!
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

学无止境
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

aircraftvip

专家顾问 (正式写手)

【答案】应助回帖

★ ★ ★ ★ ★
红舟流星: 金币+1, 应助指数+1, 专家考核, 说没有显著氧化,但是DMSO对于氧化原理又是什么?@liuanan 2012-08-28 09:23:26
yuzaifei: 金币+4, 如此学术,虽然不是很有用,也鼓励一下 2012-08-28 22:16:05
引用回帖:
3楼: Originally posted by liuanan at 2012-08-27 16:42:44
我觉得不行,我记得DMSO对巯基有氧化作用,谷胱甘肽加入之后自己就会被氧化生成二硫键了吧

One original paper was J. Org. Chem., 41(11), 2061 - 2064 (1976).

It says the oxidation process worked in the presence small amount of bromine or Hydrogen bromide as catalyst, at high temperature as 180°C, in the presence of water.

"Further, Lipton and Bodwel14 have reported that cystine is oxidized to cysteic  acid  by  minor  amounts  of  MezSO  under  conditions
used for the acid-catalyzed hydrolysis of proteins."

I still think the best way is to make a conclusion after practical evidence. Since nobody could tell whether the oxidation would be significant if some of the conditions (temperature, pH, catalyst...) were changed.
格物致知,知行合一
4楼2012-08-28 03:09:43
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 12 个回答

aircraftvip

专家顾问 (正式写手)

【答案】应助回帖

★ ★ ★
感谢参与,应助指数 +1
红舟流星: 金币+1, 专家考核, 感谢交流回帖,但是二、三楼你两谁对谁错我就不知道了 2012-08-27 20:33:49
yuzaifei: 金币+2, 有帮助, 谢谢参与 2012-08-28 22:15:08
The best way is to make a model reaction.
Of course make the reaction using DMSO-D6 as solvent in a NMR tube.
格物致知,知行合一
2楼2012-08-27 16:24:31
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

liuanan

专家顾问 (著名写手)

【答案】应助回帖

★ ★ ★
感谢参与,应助指数 +1
红舟流星: 金币+1, 专家考核, 感谢交流回帖,但是二、三楼你两谁对谁错我就不知道了 2012-08-27 20:34:00
yuzaifei: 金币+2, 有帮助, 谢谢,也提供了一种可能性 2012-08-28 22:15:36
我觉得不行,我记得DMSO对巯基有氧化作用,谷胱甘肽加入之后自己就会被氧化生成二硫键了吧
3楼2012-08-27 16:42:44
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

aircraftvip

专家顾问 (正式写手)

【答案】应助回帖

★ ★ ★ ★ ★
markar: 金币+1, 感谢回帖交流 2012-08-28 15:33:44
yuzaifei: 金币+4, 有帮助, 赞学术,感谢您的认真讲解 2012-08-28 22:16:42
引用回帖:
4楼: Originally posted by aircraftvip at 2012-08-28 03:09:43
One original paper was J. Org. Chem., 41(11), 2061 - 2064 (1976).

It says the oxidation process worked in the presence small amount of bromine or Hydrogen bromide as catalyst, at high temperature ...

mechanism of Swern Oxidation---Wikipedia

The first step of the Swern oxidation is the low-temperature reaction of dimethyl sulfoxide (DMSO), 1a, formally as resonance contributor 1b, with oxalyl chloride, 2. The first intermediate, 3, quickly decomposes giving off CO2 and CO and producing dimethylchlorosulfonium chloride, 4.



After addition of the alcohol 5, the dimethylchlorosulfonium chloride 4 reacts with the alcohol to give the key alkoxysulfonium ion intermediate, 6. The addition of at least 2 equivalents of base — typically triethylamine — will deprotonate the alkoxysulfonium ion to give the sulfur ylide 7. In a five-membered ring transition state, the sulfur ylide 7 decomposes to give dimethyl sulfide and the desired ketone (or aldehyde) 8.

格物致知,知行合一
5楼2012-08-28 14:02:12
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 317求调剂 +3 申子申申 2026-03-19 5/250 2026-03-19 13:47 by houyaoxu
[考研] 一志愿 西北大学 ,070300化学学硕,总分287,双非一本,求调剂。 +3 晨昏线与星海 2026-03-19 3/150 2026-03-19 13:36 by houyaoxu
[考研] 一志愿南昌大学,327分,材料与化工085600 +3 Ncdx123456 2026-03-19 3/150 2026-03-19 13:18 by houyaoxu
[考研] 一志愿武汉理工材料工程专硕调剂 +3 Doleres 2026-03-19 3/150 2026-03-19 12:29 by peike
[考研] 346求调剂[0856] +3 WayneLim327 2026-03-16 6/300 2026-03-19 11:21 by WayneLim327
[考研] 一志愿武理材料305分求调剂 +5 想上岸的鲤鱼 2026-03-18 6/300 2026-03-18 17:53 by 无际的草原
[考研] 280求调剂 +6 咕噜晓晓 2026-03-18 7/350 2026-03-18 11:25 by 无际的草原
[考研] 278求调剂 +5 烟火先于春 2026-03-17 5/250 2026-03-18 08:43 by 星空星月
[考博] 26博士申请 +3 1042136743 2026-03-17 3/150 2026-03-17 23:30 by 轻松不少随
[考研] 290求调剂 +3 p asserby. 2026-03-15 4/200 2026-03-17 16:35 by wangkm
[考研] 26考研求调剂 +6 丶宏Sir 2026-03-13 6/300 2026-03-17 16:13 by 醉在风里
[考博] 26申博 +4 八6八68 2026-03-16 4/200 2026-03-17 13:00 by 轻松不少随
[考研] 一志愿南京大学,080500材料科学与工程,调剂 +4 Jy? 2026-03-16 4/200 2026-03-17 11:02 by gaoqiong
[考研] 机械专硕325,寻找调剂院校 +3 y9999 2026-03-15 5/250 2026-03-16 19:58 by y9999
[考研] 085601材料工程315分求调剂 +3 yang_0104 2026-03-15 3/150 2026-03-15 10:58 by peike
[考研] 288求调剂 +4 奇点0314 2026-03-14 4/200 2026-03-14 23:04 by JourneyLucky
[考研] 289求调剂 +4 这么名字咋样 2026-03-14 6/300 2026-03-14 18:58 by userper
[考研] 招收0805(材料)调剂 +3 18595523086 2026-03-13 3/150 2026-03-14 00:33 by 123%、
[考研] 0856材料与化工301求调剂 +5 奕束光 2026-03-13 5/250 2026-03-13 22:00 by 星空星月
[考研] 085600材料与化工 309分请求调剂 +7 dtdxzxx 2026-03-12 8/400 2026-03-13 14:43 by jxchenghu
信息提示
请填处理意见