EP2129679A2 - Procédé de préparation d'halogénures d'adamantylarylmagnésium substitués - Google Patents

Procédé de préparation d'halogénures d'adamantylarylmagnésium substitués

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Publication number
EP2129679A2
EP2129679A2 EP07858234A EP07858234A EP2129679A2 EP 2129679 A2 EP2129679 A2 EP 2129679A2 EP 07858234 A EP07858234 A EP 07858234A EP 07858234 A EP07858234 A EP 07858234A EP 2129679 A2 EP2129679 A2 EP 2129679A2
Authority
EP
European Patent Office
Prior art keywords
substituted
reaction
adamantylarylhalide
adamantyl
adamantylarylmagnesium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07858234A
Other languages
German (de)
English (en)
Inventor
Ivars Kalvinsh
Aleksandrs Chernobrovijs
Vyacheslav Tribulovich
Vladimir Labeish
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JSC Grindeks
Original Assignee
JSC Grindeks
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JSC Grindeks filed Critical JSC Grindeks
Publication of EP2129679A2 publication Critical patent/EP2129679A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
    • C07F3/02—Magnesium compounds

Definitions

  • the present invention concerns fine organic synthesis, particularly the method for preparing of substituted adamantylarylmagnesium halides.
  • Organomagnesium compounds are especially important in contemporary preparative organic chemistry. Since Grignard's discovery in 1900 the methods for preparing and further transformation of these synthetic intermediates are in continuous development and expansion.
  • the standard preparative method for preparing organomagnesium compounds (Grignard's reagents) is direct interaction of organic halides with metallic magnesium in an aprotic polar solvent, like tetrahydrofuran (THF) or diethyl ether [C. T. Ho ⁇ e, A. H. HecMeaHOB Me ⁇ o ⁇ bi aneivieHTO - opraHMHecKOM XMMMM. MamnM, ⁇ epunnuM, ⁇ aj ⁇ ibL_,MM, CTPOHUMM, ⁇ apuM. H3fl. AH CCCP M. 1963, 14-27].
  • the aim of the present invention is a development of method for preparing substituted adamantylarylmagnesium halides, satisfying the following requirements:
  • the compounds produced are active intermediates that can interact with various electrophiles to yield substrates useful for the synthesis of a wide range of biologically active compounds [Charpentier, B.; Bernardon, J.-M.; Eustache, J. et al. Synthesis, structure-affinity relationships, and biological activities of ligands binding to retinoic acid receptor subtypes. J. Med. Chem. 1995, 38 (26), 4993-5006. Cincinelli, R.; Dallavalle, S.; Nannei, R. Synthesis and structure-activity relationships of a new series of retinoid-related biphenyl-4-ylacrylic acids endowed with antiproliferative and proapoptotic activity. J. Med. Chem.
  • Adapalene is a pharmaceutical widely used in dermatology as efficient agent for treating acne vulgaris [Waugh, J.; Noble, S.; Scott, L. Spotlight on adapalene in acne vulgaris. J. Am. J. Clin. Dermatol. 2004, 5 (5), 369- 371 ; Jain, S. Topical tretinoin or adapalene in acne vulgaris:
  • 3-(1 -Adamantyl)-4-(fe/t-butyldimethylsilyloxy)phenylmagnesium bromide or 3-(1 -adamantyl)-4-benzyloxy- phenylmagnesium bromide can also be used for synthesis of 4-[3-(1 -adamantyl)-4-hydroxyphenyl]-3- chlorocynnamic acid (3-CI-AHPC),
  • the reduction of adamantylaryl halide as the main reaction of starting material under the conditions of Grignard's reaction may be the result of the instability of the adamantylarylmagnesium halide or the consequence of low reactivity of the Grignard's reactant with the employed electrophile.
  • Grignard's reagent formed from 2-(1- adamantyl)-4-bromoanisole, is an unstable substance and undergoes a formal reduction before interaction with any electrophile.
  • the closest prior art to the present invention is the exchange method for preparing organomagnesium reagent [Krasovskiy, A.; Knochel, P. A LiCI-mediated Br/Mg exchange reaction for the preparation of functionalized aryl - and heteroarylmagnesium compounds from organic bromides.
  • This method is based on preparing of AIkMgCI-LiCI or AIk 2 Mg-LiCI complexes and their interaction with substituted aryl or heteroaryl halides.
  • the present method for preparing substituted adamantyl- arylmagnesium halides is based on assumption that under the standard conditions of organomagnesium synthesis, i.e., acting by aryl halides on magnesium metal, the addition of lithium chloride stabilizes the substituted adamantylarylmagnesium halide by complex formation and prevents further unwanted reactions but does not fatally depress the reactivity of the substituted adamantylarylmagnesium halide.
  • Example 1 The method according to the present invention is illustrated by the following examples.
  • Example 1 The method according to the present invention is illustrated by the following examples.
  • the reaction mixture is decomposed with a solution of 50 ml_ of hydrochloric acid in 50 ml_ water with vigorous stirring without external cooling.
  • the mixture is transferred to separating funnel and the water and organic layers separated.
  • To the water layer 200 ml_ of water is added and then extracted twice with 10O mL of diethylether.
  • the pooled organic solutions are dried on anhydrous sodium sulfate, the solvents removed in vacuo at about 50 0 C in the water bath.
  • the residue is treated with 200 ml_ of hexane and left in the freezer overnight.
  • the precipitate is filtered off, washed with cold ethyl acetate and dried at 100 0 C. 3-(1 -adamantyl)-4-methoxyphenylboronic acid with m.p.
  • the compound was isolated and identified as 2-(1 - adamantyl)anisole.
  • the preparative yield is 67%, m.p. 100-102 0 C.
  • Example 2 Reaction is performed as described in Example 1.
  • adamantylarylhalide 5O g (0.16 M) of 2-(1 -adamantyl)-5-bromoanisole is used.
  • 4-(1-adamantyl)-3-methoxyphenylboronic acid, 3 g (6.8%) is obtained.
  • the gas chromatography data give the yield 2-(1 - adamantyl)anisole as 81 %.
  • the formal reduction product of 2-(1 -adamantyl)-5-bromoanisole was isolated and its identity with 2-(1-adamantyl)anisole obtained in Example 1 confirmed, thus confirming the structure ascribed.
  • Example 3 Reaction is performed as described in Example 1.
  • adamantylarylhalide 56 g (0.16 M) of 3-(1-adamantyl)-5-bromoveratrol is used.
  • 3-(1 -adamantyl)-4,5-methoxyphenylboronic acid 3.7 g (7.3%) is obtained.
  • the gas chromatography data give the yield 3-(1 - adamantyl)veratrol as 74%.
  • Example 5 Reaction is performed as described in Example 1. Simultaneous addition of arylhalide and 1 ,2-dibromoethane did not change the result.
  • reaction mixture according to gas chromatography data contains 70-75% of adamantylbenzene derivative and 3-11 % of the expected arylphenylmethanol
  • Grignard's reagent was prepared from 51 g (0.16 M) of 2-(1 - adamantyl)-4-bromoanisole as in Example 1.
  • 17 g (16.5 ml_, 0.16 M) of benzaldehyde and 10O mL of dry tetrahydrofuran was introduced, the solution cooled to 0 0 C and under stirring the solution of the Grignard's reagent added within 10 min.
  • the mixture was left for 16 h in a refrigerator at about 0 0 C.
  • the reaction mixture is decomposed with a solution of 25 ml_ of hydrochloric acid in 25 ml_ of water with vigorous stirring without external cooling.
  • the mixture is transferred to separating funnel and the water and organic layers separated, the water layer extracted with 2 portions of 100 ml_ of diethyl ether.
  • the pooled organic layers were dried over sodium sulfate.
  • Grignard's reagent was prepared from 10 g (0.032 M) of 2-(1 - adamantyl)-4-bromoanisole as in Example 1.
  • As the electrphile for functionalization and identification a mixture of D 2 SO 4 - D 2 O was used.
  • reaction mixture is decomposed with a solution of 2 ml_ of
  • Example 8 (according to prior art) Into a 200 ml_ flask with a magnetic stirrer and dropping funnel 5.14 g (0.016 M) of 2-(1 -adamantyl)-4-bromoanisole and 60 ml_ of dry tetrahydrofuran is introduced. The air in the flask is displaced by argon and all further operations conducted under a slight stream of the inert gas. The mixture is cooled to -5 0 C and 3 Eq of 0.5 M iso-PrMgCI LiCL solution in tetrahydrofuran added, keeping the reaction temperature within -5 - O 0 C range.
  • iso-PrMgCI LiCL solution in tetrahydrofuran was prepared beforehand, its concentration determined by titration according to [Krasovskiy, A.; Knochel, P. Convenient titration method for organometallic zinc, magnesium, and lanthanide reagents. Synthesis 2006, 5, 890-891].
  • Example 12 Reaction is performed as described in Example 11.
  • the Ghgnard's reagent is produced with 0.07g (0.0016 M, 1 eq.) of pulverized anhydrous LiCI.
  • the molar rate of substrate ⁇ iCI is 1 :0.1. Yield, according to gas chromatography data is 16%.
  • Reaction is performed as described in Example 11.
  • the Ghgnard's reagent is produced with 0.34 g (0.008 M) of pulverized anhydrous LiCI.
  • the molar rate of substrate ⁇ iCI is 1 :0.5. Yield, according to gas chromatography data is 30%.
  • Example 15 Reaction is performed as described in Example 11.
  • the Ghgnard's reagent is produced with 0.68 g (0.016 M) of pulverized anhydrous LiCI.
  • the molar rate of substrate ⁇ iCI is 1 :1. Yield, according to gas chromatography data is 75%.
  • Example 15
  • Example 20 Reaction is performed as described in Example 18.
  • the Grignard's reagent is produced with 0.68 g (0.016 M) of pulverized anhydrous LiCI.
  • the molar rate of substrate ⁇ iCI is 1 :1. Yield, according to gas chromatography data is 74%.
  • Example 31 Reaction is performed as described in Example 11.
  • adamantylarylhalide 6.35 g (0.016 M) of 3-benzyloxy-4-(1 - adamantyl)brombenzene is used.
  • Example 37 Reaction is performed as described in Example 11.
  • adamantylarylhalide 7.18 g (0.016 M) of 3-(tert-butyldimethylsilyloxy)-4-[1 - (3,5-dimethyladamantyl)brombenzene is used.
  • Example 42 Reaction is performed as described in Example 11.
  • adamantylarylhalide 5.84 g (0.016 M) of 3-[2-(2-methyladamantyl)-5- bromoveratrol is used.
  • the present method for preparation of substituted adamantylarylmagnesium halides is characterized by stable high yields, technological feasibility and possibility to scale up the reaction volume.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

L'invention concerne une synthèse organique fine, en particulier un procédé de préparation d'halogénures d'adamantylarylmagnésium. Les procédés connus de préparation d'un réactif de Grignard à partir d'un halogénure d'adamantylaryle substitué n'offrent qu'un faible rendement du produit désiré. Les halogénures d'adamantylaryle substitués sont des intermédiaires actifs qui, en interagissant avec divers électrophiles, permettent d'obtenir une large gamme de composés biologiquement actifs. Le procédé de l'invention permet de préparer des halogénures d'adamantylarylmagnésium substitués par adjonction de chlorure de lithium lors de la synthèse du réactif de Grignard, l'halogénure d'adamantylaryle substitué agissant sur le métal magnésium dans un tétrahydrofuran sec sous argon. Il a été démontré qu'en ajoutant du chlorure de lithium à l'halogénure d'adamantylaryle selon un rapport compris entre 1:1 et 1:2, on pouvait obtenir un rendement élevé stable du produit final désiré.
EP07858234A 2006-12-28 2007-12-28 Procédé de préparation d'halogénures d'adamantylarylmagnésium substitués Withdrawn EP2129679A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LV060151A LV13735B (en) 2006-12-28 2006-12-28 Method for manufacturing substituted adamantylarylmagnesium chalogenides
PCT/EP2007/064648 WO2008080993A2 (fr) 2006-12-28 2007-12-28 Procédé de préparation d'halogénures d'adamantylarylmagnésium substitués

Publications (1)

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EP2129679A2 true EP2129679A2 (fr) 2009-12-09

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EP (1) EP2129679A2 (fr)
EA (1) EA015949B1 (fr)
LV (1) LV13735B (fr)
UA (1) UA97507C2 (fr)
WO (1) WO2008080993A2 (fr)

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CN117511212B (zh) * 2023-11-09 2024-04-12 东莞市好易达新材料科技有限公司 一种耐高温的硅树脂玻璃纤维套管和制备方法

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CN100348569C (zh) 2001-11-30 2007-11-14 伯哈姆学院 癌细胞中编程性细胞死亡的诱导
EP1582523A1 (fr) 2004-04-02 2005-10-05 Ludwig-Maximilians-Universität München Procédé de préparation de composés organomagnésiens

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Also Published As

Publication number Publication date
UA97507C2 (ru) 2012-02-27
LV13735B (en) 2008-09-20
EA015949B1 (ru) 2011-12-30
WO2008080993A3 (fr) 2009-03-12
WO2008080993A2 (fr) 2008-07-10
EA200900899A1 (ru) 2010-02-26

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