摘要:
Disclosed are process steps and processes for producing chromane compounds, preferably 2-(6-amino-chroman-2yl) acetic acid esters which are intermediates for producing platelet aggregation inhibitors and/or are themselves potent platelet aggregation inhibitors.
摘要:
The present invention is directed to methods for the preparation of enantiomerically pure quinazolinones, intermediates in such methods, and compositions comprising such quinazolinones.
摘要:
The presently disclosed subject matter provides methods of preparing synthetic prostacyclin analogs, including Beraprost, either as racemic mixtures or as single stereoisomers. Also provided are novel synthetic intermediates for use in these methods.
摘要:
The presently disclosed subject matter provides methods of preparing synthetic prostacyclin analogues, including Beraprost, either as racemic mixtures or as single stereoisomers. Also provided are novel synthetic intermediates for use in these methods.
摘要:
A process for the preparation of 2-chloro-4,5-difluorobenzoic acid and 2,4,5-trifluorobenzoic acid as well as synthetic intermediates useful in and prepared according thereto, comprising reacting a nitrobenzene having the formula ##STR1## wherein X is chloro or fluoro, with an appropriate carbanion to form a compound having the formula ##STR2## wherein one of Y and Z is chloro and the other is nitro, and R is a radical selected from the group consisting of --CCl.sub.3, --CH.sub.2 NO.sub.2, --CH(NO.sub.2)R.sup.1, --CH(CO.sub.2 R.sup.1).sub.2, --CH(C(O)R.sup.2).sub.2, --CH(CN)CO.sub.2 R.sup.1, --CH(CO.sub.2 R.sup.1)COR.sup.2 and --COR.sup.2 where R.sup.1 is alkyl or arylalkyl and R.sup.2 is alkyl, aryl or arylalkyl and, where appearing more than once in such a radical, R.sup.1 and R.sup.2 may be the same or different at each occurrence.
摘要翻译:一种制备2-氯-4,5-二氟苯甲酸和2,4,5-三氟苯甲酸的方法,以及可用于和制备的合成中间体,包括使具有下式的硝基苯:其中X为 氯或氟,与适当的碳负离子形成具有下式的化合物:硝基,R是选自-CCl 3,-CH 2 NO 2,-CH(NO 2)R 1,-CH(CO 2 R 1) 2,-CH(C(O)R 2)2,-CH(CN)CO 2 R 1,-CH(CO 2 R 1)COR 2和-COR 2,其中R 1是烷基或芳基烷基,R 2是烷基,芳基或芳烷基,并且其中出现多于一次 在这样的基团中,R 1和R 2可以在每次出现时相同或不同。
摘要:
The presently disclosed subject matter provides a method of synthesizing prostaglandins and prostaglandin analogs comprising the ring closing metathesis of compounds of Formula (I). Also provided are novel compounds of Formula (I) and Formula (II). In addition to their use as synthetic intermediates in the presently disclosed methods, compounds of Formula (II) can be used as prostaglandin and/or prostaglandin analog prodrugs.
摘要:
A process for the preparation of halobenzoic acids, comprising the step of reacting a halonitrobenzene with a pyridinium salt to form an intermediate of the formula ##STR1## wherein R is selected from the group consisting of hydrogen, alkyl, aryl, alkenyl, alkynyl, --CN, --COOR' and --COR' where R' is alkyl or aryl; X is chloro or fluoro; Y is hydrogen, chloro or fluoro; and Z is chloro, bromo or iodo.
摘要:
A method of preparing a N-acyl-N,N′,N′-alkylenediamine trialkanoic acid ester comprising contacting a cyclic amidine with an ester of a haloalkanoic acid is provided. In some embodiments, the method involves preparing a N-acyl-N,N′,N′-ethylenediamine trialkanoic acid ester by contacting a 2-alkyl imidazoline with the ester of haloalkanoic acid. In some embodiments, the N-acyl-N,N′,N′-alkylenediamine trialkanoic acid ester is a synthetic intermediate in the preparation of a N-acyl-N,N′,N′-alkylenediamine trialkanoic acid or a salt thereof. In some embodiments, the method provides novel N-acyl-N,N′,N′-alkylenediamine trialkanoic acids and/or esters, which can be used, for example, as chelating agents.
摘要:
The presently disclosed subject matter provides a method of synthesizing prostaglandins and prostaglandin analogs comprising the ring closing metathesis of compounds of Formula (I). Also provided are novel compounds of Formula (I) and Formula (II). In addition to their use as synthetic intermediates in the presently disclosed methods, compounds of Formula (II) can be used as prostaglandin and/or prostaglandin analog prodrugs.