테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란

한글명:테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란

카스 번호16409-43-1

상품명:4-Methyl-2-(2-methyl-1-propenyl)tetrahydropyran (cis- and trans- mixture)

CBNumberCB5344138

분자식C10H18O

포뮬러 무게154.25

MOL 파일16409-43-1.mol

동의어(한글)

테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란(CASNO.16409-43-1)

아이소부테닐메틸테트라하이드로피란

테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란

화학적 성질

끓는 점	86 °C20 mm Hg(lit.)
밀도	0.873 g/mL at 20 °C(lit.)
증기압	53Pa at 20℃
FEMA	3236 \| TETRAHYDRO-4-METHYL-2-(2-METHYLPROPEN-1-YL)PYRAN
굴절률	n20/D 1.454
인화점	157 °F
저장 조건	under inert gas (nitrogen or Argon) at 2-8°C
색상	무색의 이동성 액체.
냄새	디프로필렌 글리콜 중 1.00%. 녹색 빨간 장미 매운 신선한 제라늄
?? ??	꽃향기
optical activity	[α]20/D 28±1°, neat
수용성	920mg/L at 20℃
JECFA Number	1237
BRN	1680588
LogP	3.3 at 23℃
CAS 데이터베이스	16409-43-1(CAS DataBase Reference)
EPA	2H-Pyran, tetrahydro-4-methyl-2-(2-methyl-1-propenyl)- (16409-43-1)

위험 및 안전 성명

위험품 표기	Xi
위험 카페고리 넘버	38-36/37/38
안전지침서	36-26
WGK 독일	3
RTECS 번호	UQ1470000
F 고인화성물질	10-23
HS 번호	29329990
독성	The acute oral LD₅₀ value in rats was reported as 4.3 g/kg (3.7-4.9 g/kg) and the acute dermal LD₅₀ value in rabbits as > 5 g/kg (Moreno, 1973).

그림문자(GHS)

테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란 화학적 특성, 용도, 생산

화학적 성질
Rose Oxide occurs in small quantities, mainly as the levorotatory cis form, in essential oils (e.g., Bulgarian rose oil and geranium oil). Commercial synthetic products are either optically active or inactive mixtures of the cis- and trans-isomers. Their sensory properties depend on the starting material and the method of synthesis.They are colorless liquids with a strong odor reminiscent of geranium and rose oil.
출처
Reported found in the oils of rose (Bulgarian) and geranium (Réunion); both the cis- and the trans-form have been reportedly isolated from geranium oil. Unidentified isomers reported found in black currant berries, passion fruit, some types of Thymus and white wine.
제조 방법
Rose oxide is usually prepared from citronellol, which can be converted into a mixture of two allyl hydroperoxides by photosensitized oxidationwith singlet oxygen. Reduction of the hydroperoxideswith sodium sulfite yields the corresponding diols . Treatmentwith dilute sulfuric acid results in allylic rearrangement and spontaneous cyclization of one of the isomers; amixture of diastereoisomeric rose oxides is thus formed. The unreacted diol isomer is separated by distillation. (?)- Citronellol as the starting material yields an approximately 7 : 3 mixture of (?)-cisand (?)-trans-rose oxide. Higher proportions of the cis-isomer may be obtained by dehydration with a stronger acid.Other methods for the production of rose oxide starting from citronellol consist of halogenation–dehalogenation reactions of citronellol.
An alternative technical process does not use citronellol but starts from prenal [107-86-8] and 3-methyl-3-buten-1-ol [763-32-6]. Under acidic conditions, the reaction affords a mixture of isomers of dehydro rose oxide (C₁₀H₁₆O6; [1786- 08-9], [92356-05-3], [60857-05-8]). Subsequent hydrogenation using a ruthenium/alumina catalyst leads to rose oxide.The proportion of cis-isomer can be increased by isomerization under acidic conditions.

테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란 준비 용품 및 원자재

테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란 공급 업체

테트라하이드로-4-메틸-2-(2-메틸-1-프로페닐)-2H-피란 관련 검색

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