(2R)Tetrahydro-2-furancarbothioic S-acid -Drug Synthesis Database

【结构式】

【分子编号】11688

【品名】(2R)Tetrahydro-2-furancarbothioic S-acid

【CA登记号】

【分子式】C₅H₈O₂S

【分子量】132.18332

【元素组成】C 45.43% H 6.1% O 24.21% S 24.26%

与该中间体有关的原料药合成路线共 2 条

合成路线1 合成路线2

合成路线1

该中间体在本合成路线中的序号：(II)

This compound is prepared by several related ways: 1) The reaction of silylated azetidinone (I) with tetrahydrofuran-2-thiocarboxylic acid (II) by means of NaOH in THF - water gives the azetidinone thioester (III), which is condensed with allyl glyoxylate in refluxing benzene yielding the hydroxyester (IV). The reaction of (IV) with SOCl2 affords the chloroester (V), which by reaction with triphenylphosphine by means of lutidine in hot THF is converted into the phosphoranylidene derivative (VI). The elimination of the silyl protecting group of (VI) with tetrabutylammonium fluoride gives the azetidinone (VII), which is cyclized in refluxing toluene yielding the (5R,6S)-6-[1(R)-hydroxyethyl]-2-[2(R)-tetrahydrofuryl]penem-3-carboxyli c acid allyl ester (VIII). Finally, this compound is hydrolyzed with triphenylphosphine, sodium 2-ethylhexanoate and Pd-tetrakis(triphenylphosphine). 2) The condensation of the silver salt of protected azetidinone (IX) with tetrahydrofuran-2(R)-carbonyl chloride (X) also yields the phosphoranylidene salt (VI). 3) Phosphoranylidene ester (VI) can also be cyclized first in refluxing benzene yielding the silylated penem ester (XI), which is deprotected with tetrabutylammonium fluoride to (VIII). 4) The hydrolysis of allyl ester (VIII) to the final product can also be performed with paladium tetrakis(triphenylphosphine) and sodium 4-(methoxycarbonyl)-5,5-dimethylcyclohexane-1,3-dione enolate in several different solvents such as methyl acetate, ethylacetate, tetrahydrofuran, dioxane, sec-butanol, acetonitrile, acetone, 2-butanone, 1,2-dichloroethane, chlorobenzene, toluene, or ethylene glycol dimethyl ether. 5) The preceding hydrolysis can also be performed with triphenylphosphine and paladium tetrakis(triphenylphosphine) with sodium propionate, sodium acetate or sodium lactate in tetrahydrofuran or acetone.

参考文献中间体

合成目标

【1】 Ishiguro, M.; Iwata, H.; Nakatsuka, T. (Suntory Ltd.); Penem cpds. AU 8654460; EP 0199446; JP 1994128267; US 4997829 .
【2】 Ishiguro, M.; Iwata, H.; Nakatsuka, T.; Nakajima, M.; Yamada, Y.; Doi, J.; Fujimaru, M. (Suntory Ltd.); Processes for removing allyl groups. EP 0410727 .
【3】 Ishiguro, M.; Yamada, Y.; Kimura, Y.; Imai, K. (Nippon Soda Co., Ltd.; Suntory Ltd.); Methods for removing allyl groups. JP 1992041489 .
【4】 Castaner, J.; Mealy, N.; Prous, J.; SUN-5555. Drugs Fut 1993, 18, 6, 525.

中间体序号	中间体编号	品名	分子式	供应商	用于合成
	30139	allyl 2-oxoacetate	C₅H₆O₃	详情	详情
(I)	11687	(2R,3R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetanyl acetate	C₁₃H₂₅NO₄Si	详情	详情
(I)	52164	(3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-(phenylsulfonyl)-2-azetidinone	C₁₇H₂₇NO₄SSi	详情	详情
(II)	11688	(2R)Tetrahydro-2-furancarbothioic S-acid	C₅H₈O₂S	详情	详情
(III)	11689	S-[(2R,3S)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetanyl] (2R)tetrahydro-2-furancarbothioate	C₁₆H₂₉NO₄SSi	详情	详情
(IV)	11690	allyl 2-((3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-2-oxo-4-[[(2R)tetrahydro-2-furanylcarbonyl]sulfanyl]azetanyl)-2-hydroxyacetate	C₂₁H₃₅NO₇SSi	详情	详情
(V)	11691	allyl 2-((3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-2-oxo-4-[[(2R)tetrahydro-2-furanylcarbonyl]sulfanyl]azetanyl)-2-chloroacetate	C₂₁H₃₄ClNO₆SSi	详情	详情
(VI)	11692	allyl 2-((3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-2-oxo-4-[[(2R)tetrahydro-2-furanylcarbonyl]sulfanyl]azetanyl)-2-phosphinideneacetate	C₂₁H₃₄NO₆PSSi	详情	详情
(VII)	11693	allyl 2-((3S,4R)-3-[(1R)-1-hydroxyethyl]-2-oxo-4-[[(2R)tetrahydro-2-furanylcarbonyl]sulfanyl]azetanyl)-2-phosphinideneacetate	C₁₅H₂₀NO₆PS	详情	详情
(VIII)	11694	allyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-[(2R)tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate	C₁₅H₁₉NO₅S	详情	详情
(IX)	11695	(3S,4R)-2-[3-(1(R)-Hydroxyethyl)-2-oxo-4-sulfanylazetidin-1-yl]-2-(triphenylphosphanylidene)acetic acid allyl ester	C₁₆H₂₇AgNO₄PSSi	详情	详情
(X)	11696	(2R)Tetrahydro-2-furancarbonyl chloride	C₅H₇ClO₂	详情	详情
(XI)	11697	allyl (5R,6S)-6-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-7-oxo-3-[(2R)tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate	C₂₁H₃₃NO₅SSi	详情	详情

合成路线2

该中间体在本合成路线中的序号：(VII)

Treatment of the silylated azetidinone (I) with tritylmercaptan affords the tritylsulfanylazetidinone (II), which by reaction with AgNO3 is converted into the silver salt (III). Compound (III) is coupled with tetrahydrofuran-2(R)-carbonyl chloride (IV) obtained by treatment of carboxylic acid (V) with thionyl chloride to provide the azetidinone thioester (VI). Alternatively, compound (VI) can be obtained by condensation of tetrahydrofuran-2(R)-thiocarboxylic S-acid (VII) obtained by treatment of carboxylic acid (V) with hydrogen sulfide with silylated azetidinones (I) or (VIII) by means of NaOH in THF/water. Condensation of azetidinone thioester (VI) with allyl glyoxylate (IX) in refluxing benzene gives the hydroxy ester (X), which is treated with SOCl2 to yield the chloro ester (XI). Reaction of compound (XI) with triphenylphosphine and lutidine in hot THF provides the phosphoranylidene derivative (XII), which is converted into (5R,6S)-6-[1(R)-hydroxyethyl]-2-[2(R)-tetrahydrofuryl]penem-3-carboxylic acid allyl ester, faropenem allyl ester (XIII) by removal of the silyl protecting group with tetrabutylammonium fluoride, followed by cyclization in refluxing toluene. Compound (XII) can also be obtained by condensation of the silver salt of protected azetidinone (XIV) with tetrahydrofuran-2(R)-carbonyl chloride (V).

参考文献中间体

合成目标

【1】 Jin, J.; Han, H.-N.; Liu, J.; Synthesis of the key intermediate of faropenem: (3S,4R)-3-[(R)-1-tert-Butyldimethylsilyloxyethyl]-4-[(R)-tetrahydrofuranoylthio]-2-azetidinone. J Shenyang Pharm Univ 2001, 18, 1, 20.
【2】 Rabasseda, X.; Sorbera, L.A.; del Fresno, M.; Castaner, J.; Faropenem daloxate. Drugs Fut 2002, 27, 3, 223.
【3】 Ishiguro, M.; Iwata, H.; Nakatsuka, T. (Suntory Ltd.); Penem cpds. AU 8654460; EP 0199446; JP 1994128267; US 4997829 .

中间体序号	中间体编号	品名	CAS号	分子式	供应商	用于合成
(I)	11687	(2R,3R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetanyl acetate		C₁₃H₂₅NO₄Si	详情	详情
(II)	52161	(3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-(tritylsulfanyl)-2-azetidinone		C₃₀H₃₇NO₂SSi	详情	详情
(III)	52162			C₁₁H₂₂AgNO₂SSi	详情	详情
(IV)	11696	(2R)Tetrahydro-2-furancarbonyl chloride		C₅H₇ClO₂	详情	详情
(V)	52163	(2R)-Tetrahydro-2-furancarboxylic acid; (2R)-2-Tetrahydrofuroic acid	87392-05-0	C₅H₈O₃	详情	详情
(VI)	11689	S-[(2R,3S)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetanyl] (2R)tetrahydro-2-furancarbothioate		C₁₆H₂₉NO₄SSi	详情	详情
(VII)	11688	(2R)Tetrahydro-2-furancarbothioic S-acid		C₅H₈O₂S	详情	详情
(VIII)	52164	(3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-(phenylsulfonyl)-2-azetidinone		C₁₇H₂₇NO₄SSi	详情	详情
(IX)	30139	allyl 2-oxoacetate		C₅H₆O₃	详情	详情
(X)	11690	allyl 2-((3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-2-oxo-4-[[(2R)tetrahydro-2-furanylcarbonyl]sulfanyl]azetanyl)-2-hydroxyacetate		C₂₁H₃₅NO₇SSi	详情	详情
(XI)	11691	allyl 2-((3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-2-oxo-4-[[(2R)tetrahydro-2-furanylcarbonyl]sulfanyl]azetanyl)-2-chloroacetate		C₂₁H₃₄ClNO₆SSi	详情	详情
(XII)	52165	allyl 2-((3S,4R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-2-oxo-4-[[(2R)tetrahydro-2-furanylcarbonyl]sulfanyl]azetidinyl)-2-(triphenylphosphoranylidene)acetate		C₃₉H₄₈NO₆PSSi	详情	详情
(XIII)	11694	allyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-[(2R)tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate		C₁₅H₁₉NO₅S	详情	详情
(XIV)	52166			C₃₄H₄₁AgNO₄PSSi	详情	详情

Extended Information