intermediates

1. 5-Norbornene-2-carbonitrile

NCN

Bicyclo[2.2.1]hept-5-ene-2-carbonitrile     

CAS:95-11-4

Yellowish liquid

Purity:98%min(mostly endo-)

2. 5-Norbornene-2-carboxamide

Bicyclo[2.2.1]-5-heptene-2-carboxamide     

CAS:95-17-0

MP:194-195^。C

White powder

Purity:98.0%min(mostly endo-)

3. 5-Norbornene-2-carboxyaldehyde

NCA  

Bicyclo[2.2.1]hept-5-ene-2-carboxaldehyde

CAS:5453-80-5

BP: 67-70°C (12 mmHg)

colorless to yellowish lucid liqud

Purity:98.0%min

4. 1-Methyl-4-piperidine acetaldehyde      

CAS:10333-64-9

5. trihydroxymethylmethane     

2-hydroxymethyl-1,3-propanediol    

CAS:4704-94-3

white powder

Purity:98.0%min

6. 5-norbornene-2-carbonyl chloride

Bicyclo[2.2.1]hept-5-ene-2-carbonyl chloride

CAS:27063-48-5

BP:84-87 ℃/15mm

Yellowish liquid

Purity:98.0%min

7. (1-hydroxycyclohexyl)(phenyl)methanone   

1-Hydroxycyclohexyl phenyl ketone

1-Benzoylcyclohexanol

CAS:947-19-3

white or light yellow crystalline powder

MP: 46-50℃

Purity:98.0%min

8. 5-norbornene-2-carboxylic acid

NC   

Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid

CAS:120-74-1

BP:136-138℃/14mmHg

Yellowish liquid

Purity:98.0%min

9. t-butyl　5-norbornene-2-carboxylate

BNC  

5-Norbornene-2-carboxylic t-Butyl ester

t-butyl　Bicyclo[2.2.1]hept-5-ene-2-carboxylate

CAS:154970-45-3

BP:243 ºC

colorless to yellowish liquid

Purity:98.0%min

10. 2,2-dimethyl-5-carbethoxy-1,3-dioxane

11. 2,2-dimethyl-5-hydroxymethyl-1,3-dioxane

12． Diethyl bis(hydroxymethyl)malonate

CAS: 20605-01-0

MP: 45-52 ºC