1) α-hydroxy enones
α-羟基烯酮
1.
The purpose of this dissertation is to address the fragmentation mechanisms of different drug active molecules,including cephalosporins,4(3H)-quinazolinones andα-hydroxy enones,under atmosphere pressure ionization and traditional electron ionization,and compare the fragmentation mechanism under these two ion sources.
本论文应用大气压离子源串联质谱技术对头孢菌素、4(3H)-喹唑啉酮、α-羟基烯酮三类药物活性分子的碎裂机理进行了探讨和研究,建立了这三类化合物的质谱裂解规律,并与传统电子轰击离子源下的裂解机理进行了比较。
2) α-Hydroxy ketones
α-羟基酮
1.
α-Hydroxy ketones are frequently involved in biologically important compounds and,therefore,the determination of the stereochemistry of these structural elements has attracted the attention in natural products chemistry.
手性α-羟基酮化合物是很多天然产物不对称合成的重要中间体。
3) α-hydroxyl ketene dithioacetals
α-羟基二硫缩烯酮
1.
α-hydroxyl ketene dithioacetals possessing an allylalcohol moiety, as well as terminal bisalkylthio substituted alkene are a class of important intermediates in organic synthesis.
α-羟基二硫缩烯酮类化合物不仅含有烯丙基醇结构单元,而且双键端位被双烷硫基取代,是有机合成中的一类重要的有机中间体。
4) 17-alpha-hydroxypregnenolone
17-α-羟孕烯醇酮
5) α-bromo-4-hydroxyphenone
α-溴-4-羟基苯酮
6) Arornatic a-hydroxy ketone
芳香α-羟基酮
补充资料:16α,17α-环氧-11α-羟基黄体酮
分子式:C21H28O4
分子量:344.45
CAS号:19427-36-2
性质:熔点>234℃(247-249℃)。
制备方法:可用薯蓣皂素经开环、乙酰化、氧化、水解、消除、环氧化、氧化等步反应制得该品。
用途:可的松醋酸酯、肤轻松醋酸酯的中间体。
分子量:344.45
CAS号:19427-36-2
性质:熔点>234℃(247-249℃)。
制备方法:可用薯蓣皂素经开环、乙酰化、氧化、水解、消除、环氧化、氧化等步反应制得该品。
用途:可的松醋酸酯、肤轻松醋酸酯的中间体。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条