CN101141890A - 清凉化合物 - Google Patents

清凉化合物 Download PDF

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CN101141890A
CN101141890A CNA2006800087988A CN200680008798A CN101141890A CN 101141890 A CN101141890 A CN 101141890A CN A2006800087988 A CNA2006800087988 A CN A2006800087988A CN 200680008798 A CN200680008798 A CN 200680008798A CN 101141890 A CN101141890 A CN 101141890A
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isopropyl
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branched alkyl
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L·科尔
S·M·富勒尔
C·加洛潘
P·V·克拉韦克
J·P·斯莱克
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Givaudan SA
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Abstract

一种通过施加式(I)化合物而向身体皮肤或黏膜提供清凉感觉的方法,其中,X为H或(CH2)n-R,n为0或1,Y和Z独立地选自H、OH、苯基、C1-C4直链或支链烷基或C1-C4直链或支链烷氧基,或者X和Y一起形成选自-O-CH2-O-、-N=CH-O-和-N=CH-S-的二价基团,所述二价基团和与其相连的碳原子一起形成5-元环;和R为带有未成键电子的基团,R1为H或C1-C5支链烷基,R2和R3为C1-C4支链烷基,或者R2和R3一起形成最多具有10个碳的单环、二环或三环基团,条件是R1、R2和R3一起包括至少6个碳。可以将该化合物结合到产品中,例如洁齿剂、食品、糖果、饮料,以及化妆品和药物制剂中。

Description

清凉化合物
本发明涉及一种提供清凉感觉的方法以及提供该作用的化合物。
清凉化合物,即赋予身体皮肤或黏膜清凉感觉的化学化合物,已经为本领域所公知,而且其广泛用于各种产品,例如食品、烟草制品、饮料、洁齿剂、漱口液和化妆品中。
一类相当成功的清凉化合物即为N-取代的对-薄荷烷甲酰胺。这些化合物的例子在例如英国专利GB1,421,744中进行了描述。
虽然已经成功地将现有技术中的一些化合物商业化,但是甲酰胺部分的复杂结构仍使其难以制备。这些化学品只能以高价提供,这就限制了其在消费产品中的使用。
现已发现,一类简单的式I的芳基甲酰胺是良好的清凉化合物,而且可以由可商购获得的苯甲酸容易地制备。因此,本发明提供一种通过施加式I化合物而向身体皮肤或黏膜提供清凉感觉的方法,
其中,
X为H或(CH2)n-R,n为0或1,Y和Z独立地选自H、OH、苯基、C1-C4直链或支链烷基或C1-C4直链或支链烷氧基,或者X和Y一起形成选自-O-CH2-O-、-N=CH-O-和-N=CH-S-的二价基团,所述二价基团和与其相连的碳原子一起形成5-元环,即,分别形成1,3-二氧戊环、1,3-_唑环或1,3-噻唑环;和
R为带有未成键电子的基团,R1为H、CH3、C2H5或C3-C5支链烷基,R2和R3为CH3,、C2H5或C3-C4支链烷基,或者R1、R2和R3中的两个或多个一起形成最多具有10个碳原子的单环、二环或三环基团,条件是R1、R2和R3一起包括至少6个碳。
R1、R2、R3和与其相连的碳一起可以为,例如对-薄荷基、冰片基或金刚烷基。
R1、R2、R3可以为手性或外消旋基团。
特定的化合物是其中R1为甲基且R2和R3为异丙基的化合物,以及其中R1、R2和R3全部为乙基的化合物。
特定的化合物是其中X位于4-位的那些化合物。其它的特定化合物是其中X位于4-位且Y和Z为H、OH、OMe或甲基的化合物,或者X和Y一起形成选自-O-CH2-O-、-N=CH-O-和-N=CH-S-的二价基团,从而和与其相连的碳原子一起形成5-元环,即,分别形成1,3-二氧戊环、1,3-_唑环或1,3-噻唑环的化合物。
带有未成键电子的特定基团R为卤素、OH、OMe、NO2、CN、Ac、SO2NH2、CHO、CO2H、CONH2、C1-C4烷基羧酸酯基如CO2Et、C1-C4烷基酰胺如CONHMe或杂环,例如:
Figure A20068000879800071
特定的R1、R2和R3组合为:
    R1     R2     R3
    H           冰片基
    H         3-对-薄荷基
    H 异丙基   异丙基
  甲基 异丙基   异丙基
  乙基  乙基   乙基
上述定义的许多化合物都是新的。因此,本发明的进一步的实施方案中提供式I的化合物:
Figure A20068000879800081
其中
X、Y、Z、R1、R2、R3如上述定义,而且其中适用下列限制条件之一:
(a)R1和X不为H,且R1、R2、R3和与其相连的碳形成非环部分;
(b)R1为H,且R2、R3和与其相连的碳形成非环部分,R2、R3中仅有一个基团为异丙基或叔丁基;
(c)R1为H,R2和R3均为异丙基,X位于4-位且不为H、卤素、Me、MeO、NO2、芳基、亚甲基二芳基、N-(4-甲脒基(carbamimidoyl)-苯基)-6-甲氧基-吡啶-2-甲酰胺、N-(4-甲脒基-苯基)-苯甲酰胺、血红素衍生物,并且R不为吗啉、N’-苯基哌嗪、苯基硫醇、对-氯苯基硫醇、异喹啉、N-连接的磺酰胺衍生物或芳基,
(d)R1为H且R2和R3均为叔丁基;X不为H;
(e)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,且X、Y和Z不为H;
(f)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,Z为H,且X或Y均不为H或OH;
(g)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,Z为H,Y为OH且X不为甲酰胺或NO2
(h)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,Z和Y均为H,且X不为H、COOH、喹啉基磺酰胺、CF3、亚甲基二芳基或血红素衍生物。
这样的化合物的特定例子为:在适用限制条件(a)、(b)和(c)时对应于式II、III和IV的那些化合物,在适用限制条件(e)、(f)、(g)和(h)时对应于式V的那些化合物:
Figure A20068000879800091
有用的立体异构体的特定例子为(1R,2S,5R)-5-甲基-2-(1-甲基乙基)-环己胺[(1R,2S,5R)-薄荷基]和(2S,5R)-5-甲基-2-(1-甲基乙基)-环己胺[(2S,5R)-薄荷基]。
用胺或氯化铵盐对苯甲酰氯进行酰胺化可以容易地制备该化合物。根据Schopohl,M.等人,Synthesis 2003,17,2689,R1=H的胺可以由其相应的酮制备。根据Jirgensons,A等人,Synthesis 2000,12,1709-1712,R1为C1-C5烷基的胺可以由其相应的醇制备。
本发明还提供一种向口服摄入、施用于皮肤或用在烟草制品中的产品提供清凉作用的方法,该方法包括在该产品中结合有效量的如上定义的化合物。本发明进一步提供一种向皮肤或口腔提供清凉感觉的组合物,该组合物包括有效量的如上定义的化合物。可以使用如上定义的化合物的组合物类型包括个人护理产品,例如洁齿剂(牙膏、牙凝胶、漱口液)、化妆品和药物制剂,例如片剂、锭剂、液体制剂、霜剂和喷雾剂、食品和糖果、硬糖、饮料等。
取决于化合物和组合物的性质、应用类型和所希望的清凉作用的程度和性质,所要求的“有效量”很自然地在非常大的范围内变化。结果,给定的任何量最多也只能是近似值。但是,常用浓度的最大值为5000ppm,也就是组合物的0.5重量%。作为普遍的规则,50-3000ppm都是固体组合物所要求的浓度。对于饮料而言,低至15ppm就可足以产生所希望的清凉作用。
除了清凉化合物之外,组合物还可以以所属技术领域公知的量含有本领域已知的、可用于这种组合物中的所有一般成分。
根据本发明,可以将不止一种的上述类型化合物用于组合物中。此外,该化合物可以与其它已知的和/或可商购的清凉化合物结合使用。这种化合物包括薄荷醇、薄荷酮、异胡薄荷醇、N-乙基对-薄荷烷甲酰胺(WS-3)、N,2,3-三甲基-2-异丙基丁酰胺(WS-23)、乳酸薄荷酯、薄荷酮甘油缩醛(Frescolat_MGA)、琥珀酸单-薄荷酯(Physcool_)、戊二酸单-薄荷酯、O-薄荷基丙三醇(CoolAct_10)和2-仲丁基环己酮(Freskomenthe_)。
完全采用常规方式就可以将该化合物结合到组合物中。
现在参考下列非限制性实施例对本发明作进一步地说明。
实施例1
薄荷基胺的制备
将41.69g羟基胺盐酸盐溶解在200mL水中。在冰浴冷却下加入40gNaOH颗粒。待NaOH溶解之后,经10分钟加入61.7gL-薄荷酮。在室温下将混合物搅拌70小时。用MTBE萃取含有白色固体球的该混合物两次。有机层用水和盐水洗涤,在MgSO4上干燥并浓缩,得到67g白色固体,其在冰浴冷却下于300mL MTBE中与12g氢化锂铝反应。在室温下搅拌混合物96小时。用丙酮和40mL HCl(1N)处理浅灰色的悬浮液。用HCl(37%)酸化淡黄色的上清液并用MTBE萃取两次。有机层用HCl(1N)洗涤。用NaOH颗粒将结合起来的水层中和至pH为13并用MTBE萃取两次。有机层用盐水洗涤,在MgSO4上干燥并浓缩,得到42.3g淡黄色的液体,其通过蒸馏纯化。
实施例2
1-甲基-1-异丙基异丁基氯化铵的制备
将18.1g 1-甲基-1-异丙基异丁基醇和15.74g氯乙腈溶解在27.2mL乙酸中并在冰浴中冷却混合物。经20分钟加入27.3g硫酸。在0℃下搅拌混合物1小时并在室温下再搅拌4小时。用冰将混合物骤冷并用MTBE萃取。有机层用NaHCO3、盐水洗涤两次,在MgSO4上干燥并浓缩,回收得到32.3g含有N-1-甲基-1-异丙基异丁基1-氯乙酰胺的黄色油,所含化合物具有下列性质:
1H NMR(300MHz,CDCl3)δppm(两个旋光异构体(rotomer)):6.4和6.05(宽s,1H),3.92和3.97(d,2H),2.09和1.93(m,2H),1.37和1.32(d,3H),0.93和0.84(m,12H)
13C NMR(75MHz,CDCl3)δppm(两个旋光异构体):165,164.5,63.1,58.2,45.25,43.4,43.1,34.35,26.95,26.9,24.6,24.2,17.7,17.5,14.7,16.6,8.35
MS/EI:207(M),205(M),192,190,164,162,150,148,136,134,97
将该油与13.7g硫脲和50mL乙酸混合在250mL乙醇中。将混合物在回流下加热过夜。加入500mL水并在室温下搅拌悬浮液30分钟。加入NaOH颗粒用以将溶液调整至碱性pH。用戊烷萃取该淡黄色溶液三次,有机层用盐水洗涤并在MgSO4上干燥。加入1L溶于Et2O中的HCl(1M),并在室温下搅拌混合物1小时。浓缩混合物得到5.3g白色结晶,其具有下列物理性质:
1H NMR(300MHz,CD3OD)δppm(两个旋光异构体):2.12和2.02(七重峰,2H),1.37和1.31(s,3H),1.03(ddd,6H),0.92(dd,6H)
13C NMR(75MHz,CD3OD)δppm(两个旋光异构体):63.3,59.3,47.2,33.8,27.75,24.5,24.3,24.2,17.7,17.4,17.1,16.9,8.5
MS/EI:263(M),248,220,192,152,135,107,92
实施例3
1,1-二乙基丙基胺的制备
按照类似于实施例2的方式处理16gl,1-二乙基丙醇,得到所希望的产物,其具有下列物理性质:
1H NMR(300MHz,CDCl3)δppm:1.33(qd,6H),0.82(td,9H)
13C NMR(75MHz,CDCl3)δppm:53.2,31.4,7.6
MS/EI:114(M-1+),98,86,69,56
实施例4
N-1-甲基-1-异丙基异丁基茴香酰胺的制备
将0.10g得自实施例2的1-甲基-1-异丙基异丁基氯化铵和0.20g吡啶溶解在5mL MTBE中并加入0.16g对-茴香酰氯。在室温下将混合物搅拌过夜。
使所得的悬浮液在MTBE和NaHCO3之间进行分配,并用MTBE萃取。有机层用盐水洗涤,在MgSO4上干燥并浓缩,得到0.38g粗产物,其通过在己烷中重结晶而纯化。
1H NMR(300MHz,CDCl3)δppm(两个旋光异构体):8.1和7.68(d,2H),6.99和6.90(d,2H),5.88(宽s,1H),3.83和3.9(s,3H),2.19和2.04(七重峰,2H),1.44和1.2(s,3H),0.99(dd,6H),0.86(dd,6H)
13C NMR(75MHz,CDCl3)δppm(两个旋光异构体):166,163,133,128.5,128,114.5,113.5,57.9,55.3,49.7,44.8,27.0,26.9,25.5,24.7,24.4,17.9,8.5
实施例5
按照与实施例4相同的步骤合成表1中所列的化合物。
表1
Figure A20068000879800121
Figure A20068000879800131
Figure A20068000879800141
实施例6:
清凉作用
根据下述的等强度(isointensity)法,由4-8人的受训鉴定小组确定化合物的清凉强度。
制备各种浓度的化合物水溶液并品尝。将每个溶液的清凉强度与参考化合物,即薄荷醇的2ppm水溶液进行比较。结果在下面列表中给出。
实施例 化合物名称  相对清凉强度
4  N-1-甲基-1-异丙基异丁基茴香酰胺     1.1
5A  N-(1-甲基-1-异丙基丁基)苯甲酰胺     0.1
5B  N-(1-甲基-1-异丙基丁基)4-氰基苯甲酰胺     1.0
5C  N-(1-甲基-1-异丙基-异丁基)O-甲基对苯二甲酰胺     1.7
5D  N-(3-对-薄荷基)O-甲基对苯二甲酰胺     2.5
5E  N-(1,1-二乙基丙基)联苯基-4-甲酰胺     1.2
5F  N-(1-甲基-1-异丙基-异丁基)联苯基-4-甲酰胺     1.5
5G  N-(1-异丙基异丁基)3-氰基苯甲酰胺     0.2
5H  N-(1-异丙基-异丁基)苯并[1,3]二氧杂环戊烯基-5-甲酰胺     0.9
5K  N-(1-甲基-1-异丙基-异丁基)苯并[1,3]二氧杂环戊烯基-5-甲酰胺     0.9
5L  N-(1,1-二乙基丙基)苯并[1,3]二氧杂环戊烯基-5-甲酰胺     0.3
5M  N-冰片基苯甲酰胺     0.6
实施例7
在漱口液中的应用
乙醇95%                     177mL
山梨糖醇70%                 250g
实施例4的化合物,其为乙醇中的1%溶液          50mL
无萜薄荷油                                    0.300g
水杨酸甲酯                                    0.640g
桉油精                                        0.922g
百里酚                                        0.639g
苯甲酸                                        1.500g
Pluronic F127                                 5.000g
糖精钠                                        0.600g
柠檬酸钠                                      0.300g
柠檬酸                                        0.100g
水                                            适量至1升
混合所有成分。将30mL所得溶液放入口中,来回搅动、漱口并吐出。口腔的每一区域都感觉到令人愉快的清凉感。
实施例8
在牙膏中的应用
不透明牙凝胶                                  97.000g
实施例5B的化合物,其为PG中的2%溶液           2.500g
无萜薄荷油                                    0.500g
将各成分混合在牙凝胶中,将一条牙凝胶放在牙刷上并且给鉴定小组成员用来刷牙。用水漱口并将水吐出。鉴定小组成员口腔中的每一区域都感觉到持久的清凉感。

Claims (11)

1.一种通过施加式I化合物而向身体皮肤或黏膜提供清凉感觉的方法:
Figure A2006800087980002C1
其中,
X为H或(CH2)n-R,n为0或1,Y和Z独立地选自H、OH、苯基、C1-C4直链或支链烷基或C1-C4直链或支链烷氧基,或者X和Y一起形成选自-O-CH2-O-、-N=CH-O-和-N=CH-S-的二价基团,所述二价基团和与其相连的碳原子一起形成5-元环;和
R为带有未成键电子的基团,R1为H或C1-C5支链烷基,R2和R3为C1-C4支链烷基,或者R2和R3一起形成最多具有10个碳的单环、二环或三环基团,条件是R1、R2和R3一起包括至少6个碳。
2.根据权利要求1的方法,其中R选自OH、OMe、NO2、CN、Ac、SO2NH2、CHO、CO2H、CONH2、C1-C4烷基羧酸酯、C1-C4烷基酰胺和杂环。
3.根据权利要求2的方法,其中杂环选自:
Figure A2006800087980002C2
4.根据权利要求1的方法,其中R1为甲基且R2和R3为异丙基,和其中R1、R2和R3均为乙基。
5.根据权利要求1的方法,其中R1、R2和R3根据下表进行选择:
    R1     R2     R3     H     冰片基     H     3-对-薄荷基     H     异丙基     异丙基     甲基     异丙基     异丙基     乙基     乙基     乙基
6.根据权利要求1的方法,其中X位于4-位。
7.根据权利要求6的方法,其中Y和Z独立地选自H、OH、OMe和甲基。
8.根据权利要求1的方法,其中在口服摄入、施用于皮肤或用于烟草制品中的产品中提供清凉作用。
9.一种向皮肤或口腔提供清凉感觉的组合物,其包括有效量的式I化合物:
其中,
X为H或(CH2)n-R,n为0或1,Y和Z独立地选自H、OH、苯基、C1-C4直链或支链烷基或C1-C4直链或支链烷氧基,或者X和Y一起形成选自-O-CH2-O-、-N=CH-O-和-N=CH-S-的二价基团,所述二价基团和与其相连的碳原子一起形成5-元环;和
R为带有未成键电子的基团,R1为H或C1-C5支链烷基,R2和R3为C1-C4支链烷基,或者R2和R3一起形成最多具有10个碳的单环、二环或三环基团,条件是R1、R2和R3一起包括至少6个碳。
10.式I化合物:
其中,
X、Y、Z、R1、R2、R3如权利要求1中所定义,而且其中适用下列限制条件之一:
(a)R1和X不为H,且R1、R2、R3和与其相连的碳形成非环部分;
(b)R1为H,且R2、R3和与其相连的碳形成非环部分,R2、R3中仅有一个基团为异丙基或叔丁基;
(c)R1为H,R2和R3均为异丙基,X位于4-位且不为H、卤素、Me、MeO、NO2、芳基、亚甲基二芳基、N-(4-甲脒基-苯基)-6-甲氧基-吡啶-2-甲酰胺、N-(4-甲脒基-苯基)-苯甲酰胺、血红素衍生物,并且R不为吗啉、N,-苯基哌嗪、苯基硫醇、对-氯苯基硫醇、异喹啉、N-连接的磺酰胺衍生物或芳基,
(d)R1为H且R2和R3均为叔丁基;X不为H;
(e)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,且X、Y和Z不为H;
(f)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,Z为H,且X或Y均不为H或OH;
(g)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,Z为H,Y为OH且X不为甲酰胺或NO2
(h)R1为H,R2和R3和与其相连的碳一起形成对-薄荷烷环,Z和Y均为H,且X不为H、COOH、喹啉基磺酰胺、CF3、亚甲基二芳基或血红素衍生物。
11.根据权利要求10的化合物,其中在适用限制条件(a)、(b)和(c)时,该化合物对应于式II、III和IV之一,在适用限制条件(e)、(f)、(g)和(h)时,该化合物对应于式V:
Figure A2006800087980005C1
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