Novel ring expansion product of penicillin V β-sulphoxide: X-ray crystal structure of 3,8-dihydro-3,3,8,8-tetramethyl-6-phenoxyacetamido-1-oxo-oxazolo-[4,3-c][1,4]thiazinium chloride
作者:Robert Thomas、David J. Williams
DOI:10.1039/c39730000226
日期:——
Pencillin Vβ-sulphoxide has been converted into a novel orange product which was structurally characterised as the 2H-1,4-thiazinium chloride (II) following an X-ray crystallographic study.
Diastereoselective oxidation of sulfides to sulfoxides with potassium peroxymonosulfate
作者:George J. Quallich、J. William Lackey
DOI:10.1016/s0040-4039(00)97444-6
日期:——
Potassiumperoxymonosulfateoxidation of sulfides to sulfoxides occurs with high diastereoselectivity.
过氧单硫酸钾将硫化物氧化为亚砜具有非对映选择性。
The microbial metabolism of penicillin V sulphoxide and its possible relevance to the mode of action of penicillin
作者:Robert Thomas
DOI:10.1039/c39790001176
日期:——
Extracellular enzymes of bacteria and streptomycetes rapidly convert two molecules of penicillinVsulphoxide into one molecule of an unstable metabolite, probably (5); the implications of this finding for the mode of action of penicillin are discussed.
A Simple and Efficient Preparation of Penicillin V β-Sulfoxide
作者:M Davis、WY Wu
DOI:10.1071/ch9861165
日期:——
Penicillin V (1) can be oxidized to the β- sulfoxide (2) in high yield in a two-phase mixture of dichloromethane and aqueous hydrogen peroxide. The addition of acids or metallic catalysts is not necessary.
青霉素 V (1) 可在二氯甲烷和过氧化氢水溶液的两相混合物中被氧化成 β-亚砜 (2),产量很高。无需添加酸或金属催化剂。
Process for penicillin epimerization
申请人:ELI LILLY AND COMPANY
公开号:EP0037729A2
公开(公告)日:1981-10-14
There is described a process for the preparation of a compound of the formula I
A process for the preparation of a compound of the formula I
which comprises reacting at least about 0.1 mole of triethylamine and at least about 0.1 mole of chlorotrimethylsilane per mole of 6β-acylaminopenicillin- 1β-sulfoxide compound of the following formula (II)
in a substantially anhydrous ether or hydrocarbon solvent, in which solvent the above 6β-acyhaminopenicillin-1β-sulfoxide (II) is present in a concentration of about 0.7 molar or greater, in a substantially anhydrous atmosphere at a temperature between about -20°C and about 20°C where in the above formulas R1 is hydrogen or an acyl group derived from a carboxylic acid; and R2 is an acyl group derived from a carboxylic acid; or R1 and R2 taken together with the nitrogen atom to which they are attached form a group of the formula
wherein R4 is the residue of an acyl group derived from a dicarboxylic acid; and R3 is hydrogen or a conventional carboxylic acid protecting group.
描述了一种制备式 I 化合物的工艺
一种制备式 I 化合物的工艺
其中包括使每摩尔下式(II)的 6β-乙酰氨基青霉素-1β-亚砜化合物至少约 0.1 摩尔的三乙胺和至少约 0.1 摩尔的氯三甲基硅烷反应
在基本上无水的醚或烃溶剂中,上述 6β-乙酰氨基青霉素-1β-亚砜 (II) 在溶剂中的浓度约为 0.7摩尔或更高,温度在约-20℃至约20℃之间的基本无水气氛中 其中在上述式中,R1是氢或由羧酸衍生的酰基;R2是由羧酸衍生的酰基;或 R1和R2与它们所连接的氮原子一起形成式中的基团
其中 R4 是衍生自二羧酸的酰基的残基;R3 是氢或常规的羧酸保护基团。