20939-62-2

Basic information

• Product Name: diethyl 3-methylcyclobutane-1,1-dicarboxylate
• CAS NO: 20939-62-2
• Molecular Formula: C₁₁H₁₈O₄
• Molecular Weight: 214.2582
• Mol File: 20939-62-2.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 237.6°C at 760 mmHg
• Flash Point: 105.1°C
• Density: 1.084g/cm³
• Vapor Pressure: 0.0444mmHg at 25°C
• Refractive Index: 1.46
• CAS DataBase Reference: diethyl 3-methylcyclobutane-1,1-dicarboxylate(CAS DataBase Reference)
• NIST Chemistry Reference: diethyl 3-methylcyclobutane-1,1-dicarboxylate(20939-62-2)
• EPA Substance Registry System: diethyl 3-methylcyclobutane-1,1-dicarboxylate(20939-62-2)

Safety Data

• Hazardous Substances Data: 20939-62-2(Hazardous Substances Data)

Upstream product

• 24330-53-8 2-methylpropane-1,3-diyl bis(4-methylbenzenesulfonate) 
• 105-53-3 diethyl malonate 
• 616-19-3 1,3-dichloro-2-methylpropane 
• 6974-77-2 1-bromo-3-chloro-2-methyl propane 

Downstream Products

• 55649-63-3 (1s_n,3R_n)/seqcis-3-Methyl-1-<(S)-(1-phenylaethyl)carbamoyl>-1-cyclobutancarbonsaeure-aethylester 
• 121609-52-7 1-(4'-Bromo-biphenyl-4-yl)-2-(3-methyl-cyclobutyl)-ethanone 
• 121609-44-7 (3-Methyl-cyclobutyl)-acetic acid 
• 101268-23-9 (3-methylcyclobutyl)methyl 4-methylbenzenesulfonate 
• 24070-81-3 (3-methylcyclobutyl)methanol 
• 57252-83-2 3-n-methylcyclobutane-1-carboxylic acid 

Relevant articles and documents

Synthesis process of 3-methyl cyclobutyl-1,1-diethyl dicarboxylate

The invention discloses a synthesis process of 3-methyl cyclobutyl-1,1-diethyl dicarboxylate. The synthesis process of the 3-methyl cyclobutyl-1,1-diethyl dicarboxylate particularly comprises the following steps: mixing 1,3-dichloro-2-methyl propane, a solvent, alkali and a catalyst, heating the mixture to refluxing temperature, adding diethyl malonate dropwise for 2 to 9 hours, reacting, refluxing and separating water, continuously performing refluxing reaction for 2 to 6 hours after adding, filtering and distilling to obtain the target product 3-methyl cyclobutyl-1,1-diethyl dicarboxylate with the yield being 30 to 65 percent. The method is simple in reaction, convenient in aftertreatment, capable of realize one-step reaction and stable in yield, and is a new synthesis process of the 3-methyl cyclobutyl-1,1-diethyl dicarboxylate.

Synthesis and Liquid Crystal Properties of Dimethylene Linked Compounds Incorporating the Cyclobutane or Spiroheptane Rings

The preparation of sixteen dimethylene linked compounds is described heptane ring>, and a comparison is made between the transition temperatures of these compounds and those of the corresponding esters.This comparison once again highlights the fact that the cyclobutane ring should be regarded, in terms of its ability to promote nematic thermal stability, as a "chain stiffener rather than as a ring system.A comparison is also made of the nematic thermal stabilities of the trans-cyclobutane and the spiroheptane systems and of the trans-cyclohexane and the spiroundecane systems.

LONG-ACTING CONTRACEPTIVE AGENTS: CYCLOPROPYL AND CYCLOBUTYL ESTERS OF NORETHISTERONE

Several esters of norethisterone (17α-ethynyl-17β-hydroxyestr-4-en-3-one) with carboxylic acids containing a cyclopropyl or cyclobutyl ring have been synthesized and the stereochemistries of the side-chains determined.