摘要:
Novel crystalline carbapenem intermediate compounds of formula I: ##STR1## wherein: R.sub.1 represents CH.sub.3 or H and an efficient process for synthesis thereof are described.
摘要:
A process of synthesizing a compound of formula 1: ##STR1## wherein P and P' each independently represent H or a protecting group, R.sup.1 represents H or C.sub.1-4 alkyl, andHal represents a halogen selected from Cl, Br and I, comprising: reacting a compound of formula 2: ##STR2## wherein P, P' and R.sub.1 are as defined above with an N,O-di-C.sub.1-4 alkyl hydroxylamine in the presence of a carbodiimide to produce a compound of formula 3: ##STR3## reacting compound 3 with a compound of formula 4:MetCH.sub.2 SiR.sub.2 R.sub.3 R.sub.4 4wherein Met represents lithium or halomagnesium;R.sub.2, R.sub.3 and R.sub.4 are C.sub.1-4 alkyl or C.sub.1-4 alkoxy, and the halo portion of halomagnesium is Cl, Br or I, to produce a compound of formula 5: ##STR4## and reacting compound 5 with a halogenating agent to produce a compound of formula 1.
摘要翻译:合成式1化合物的方法:其中P和P'各自独立地表示H或保护基,R 1表示H或C 1-4烷基,Hal表示选自Cl,Br和I的卤素,其包括:使 式2的化合物:其中P,P'和R 1如上所定义,与碳原子数为3的化合物反应形成式III化合物:使化合物3与化合物 式4:MetCH 2 SiR 2 R 3 R 44,其中Met表示锂或卤代镁; R2,R3和R4是C1-4烷基或C1-4烷氧基,卤代卤素的卤代部分是Cl,Br或I,以产生式5的化合物:使化合物5与卤化剂反应,生成化合物 公式1。
摘要:
A novel process is provided for the preparation of imidazolidinone &agr;v&bgr;3/&agr;v&bgr;5 integrin antagonists, and the useful intermediates obtained therein. These compounds are antagonists of &agr;v&bgr;3/&agr;v&bgr;5 integrin receptors and thus useful for inhibiting bone resorption and treating and preventing osteoporosis. Also disclosed is 3-{2-oxo-3-[3-(5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl)-propyl]imidazolidin-1-yl}-3(S)-(6-methoxy-pyridin-3-yl)-propionic acid in the form of a hemihydrate.
摘要:
A novel process is provided for the preparation of 3-(5,6,7,8-tetrahydro-[1,8]-naphthyridin-2-yl)-propylamine which is useful in the synthesis of &agr;v integrin receptor antagonists. Also provided are useful intermediates obtained from the process.
摘要:
The invention describes an improved process for synthesizing 1-&bgr;-methyl-2-hydroxymethyl substituted carbapenems as key intermediates for the synthesis of anti-MRSA carbapenem antibiotics. The synthesis eliminates the use of BU3SnCH2OH and HMPA, which are toxic substances and not amenable to industrial scale production. The novel intermediates are also within the scope of this invention. The invention relates to the synthesis of a compound of formula 3: wherein R1 represents H or a suitable protecting group for an alcohol; R2 represents H or methyl; and R5 represents a carboxy protecting group as well as the compounds made therein.
摘要:
The present invention relates to a process for synthesizing novel intermediates of formula III: ##STR1## wherein R.sup.1 is a halogen. The intermediate compounds described herein are useful for the preparation of carbapenem compounds.
摘要:
The invention encompasses a method for the stereoselective synthesis of alkyl proline and other amino acid derivatives which are intermediates of the farnesyl-protein transferase inhibiting CA.sup.1 A.sup.2 X motif of the protein Ras. The instant process employs an efficient diastereoselective �2,3!-Wittig rearrangement of .alpha.-allyloxy amide enolates mediated by a chiral auxiliary to provide acyclic and cyclic precursors.
摘要:
A process for preparation of a compound of formula I: wherein: R1 represents CH3 or H; and P represents a protecting group; comprising reacting a compound of formula IV: wherein R1 and P and are defined above and R4 represents triflate or SO2F; in the presence of a catalyst and (R3)3SnCH2OP″, wherein each R3 represents C1-4 lower alkyl, and P″ represents H or a protecting group, to yield the compound of formula I.
摘要:
A process of synthesizing a carbapenem compound of formula 6: is disclosed using a compound of formula 4′: The intermediate compounds that are described herein are also included in the present invention.
摘要:
A process of synthesizing a carbapenem compound of formula 6: ##STR1## is disclosed using a compound of formula 4': ##STR2## The intermediate compounds that are described herein are also included in the present invention.