Studies on quinazolinones.<b>2</b>. Synthesis of 2-(4-benzylpiperazin-1-ylmethyl)-2,3-dihydro-5<i>H</i>-oxazolo[2,3-6]quinazolin-5-one and -2,3-dihydro-5<i>H</i>-thiazolo[2,3-<i>b</i>]quinazolin-5-one
作者:Chia-Yang Shiau、Ji-Wang Chern、Kang-Chien Liu、Chao-Han Chan、Mou-Hsiung Yen、Ming-Chu Cheng、Yu Wang
DOI:10.1002/jhet.5570270552
日期:1990.7
3-dihydro-5H-oxazolo[2,3-b]quinazolin-5-one (13). The title compound, 2-(4-benzylpiperazin-1-ylmethyl)-2,3-dihydro-5H-oxazolo[2,3-b]quinazolin-5-one (7) could be obtained by a reaction of either 12 or 13 with 1-benzylpiperazine respectively. Starting from the readily available 3-allyl-2H-thioxoquinazolin-4(3H)-one (16) via the analogous reactions gave the 2-bromomethyl-2,3-dihydro-5H-thiazolo[2,3-b]-quinazolin-5-one
为了在稠合的喹唑啉系列中寻找新的降压杂环,通过合适的反应序列合成了两种代表性的化合物。用异氰酸烯丙酯处理蒽腈,以定量收率得到2-(烯丙基脲基)苄腈(10)。将化合物10环化为3-烯丙基喹唑啉-2(1 H,4(3 H)-二酮(11)。四氯化碳中的11溴化反应将其转化为相应的3-(2,3-二溴丙基)衍生物(12)。产率92%,通过碱作用使12的环闭合,得到2-溴甲基-2,3-二氢-5 H-恶唑并[2,3 - b ]喹唑啉-5-酮(13)。标题化合物2-(4-苄基哌嗪-1-基甲基)-2,3-二氢-5 H-恶唑并[2,3 - b ]喹唑啉-5-酮(7)可通过以下任一种反应获得:12或13与1-苄基哌嗪分别使用。通过类似的反应,从容易获得的3-烯丙基-2 H-硫代喹唑啉-4(3 H)-one(16)开始,得到2-溴甲基-2,3-二氢-5 H-噻唑并[2,3- b ]-喹唑啉-5-酮(19),收率良好
Efficient Synthesis of 2-Methylenethiazolo[2,3-b]quinazolinone Derivatives
Substituted o-amino-N-(prop-2-yn-1-yl) aromatic amides easily reacted with carbon disulfide (CS2) in the presence of potassium hydroxide (KOH) in EtOH under reflux conditions. Cyclization reaction followed by a favored 5-exo-dig ring closure afforded 2-methylenethiazolo[ 2,3-b]quinazolinone derivatives in good yields.
TRICYCLISCHE MERCAPTOMETHYLSUBSTITUIERTE 2,3-DIHYDRO-CHINAZOLIN-5-ONE UND 2,3-DIHYDRO-BENZO-[1,2,4]-THIADIAZIN-5,5-DIOXIDE ALS MATRIX METALLOPROTEINASE (MMP) INHIBITOREN
申请人:IBFB GmbH Privates Institut für biomedizinische Forschung und Beratung
公开号:EP1319010B1
公开(公告)日:2003-12-17
Tricylic mercaptomethyl-substituted 2,3-dihydro-quinazolin-5-ones and 2,3-dihydro-benzo-[1,2,4]-thiadiazin-5,5-dioxides as matrix metalloproteinase (MMP) inhibitors
申请人:——
公开号:US20040023953A1
公开(公告)日:2004-02-05
The invention relates to mercaptomethyl-substituted thiazolo[2,3-b]quinazolines, oxazolo[2,3-b]quinazolines and imidazolo[2,1-b]quinazolines.
It is the object of the invention to discover new matrix metalloproteinase inhibitors (MMP) and give a simple synthesis method.
The object is achieved by the production of the indicated compounds. By means of them it is possible to achieve progress using them as active substances in pharmaceutical preparations for treating diseases such as inflammatory responses of non-specific causes, sunburn and allergies.