Technology Process of (4α,4aα,7β,7aβ)-4,4a,7,7a-Tetrahydro-4,7a-dimethyl-7-(phenylmethoxy)cyclopentapyran-3(1H)-one
There total 6 articles about (4α,4aα,7β,7aβ)-4,4a,7,7a-Tetrahydro-4,7a-dimethyl-7-(phenylmethoxy)cyclopentapyran-3(1H)-one which
guide to synthetic route it.
The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:
synthetic route:
- Guidance literature:
-
Multi-step reaction with 4 steps
1: 1.) Na, HMPA, 2.) Tetra-n-butylammonium iodide / 1.) a) THF, 0 deg C, 15 min, b) room temp., 1 h, 2.) 50 deg C, 3 h
2: 96 percent / p-Toluenesulfonic acid / methanol / 1.) 1 h, 0 deg C, 2.) 4 h, room temp.
3: 100 percent / KOH / aq. ethanol / 18 h / Heating
4: 1.) p-Toluenesulfonyl chloride, 2.) 1,5-Diazabicyclo<5.4.0>undec-5-ene / 1.) Toluene, 0 deg C, 2.) a) 0 deg C, 15 min, b) 3 h, reflux
With
N,N,N,N,N,N-hexamethylphosphoric triamide; potassium hydroxide; sodium; tetra-(n-butyl)ammonium iodide; toluene-4-sulfonic acid; p-toluenesulfonyl chloride; 1,5-Diazabicyclo[5.4.0]undec-5-ene;
In
methanol; ethanol;
DOI:10.1021/jo01299a043
- Guidance literature:
-
Multi-step reaction with 5 steps
1: diethyl ether
2: 1.) Na, HMPA, 2.) Tetra-n-butylammonium iodide / 1.) a) THF, 0 deg C, 15 min, b) room temp., 1 h, 2.) 50 deg C, 3 h
3: 96 percent / p-Toluenesulfonic acid / methanol / 1.) 1 h, 0 deg C, 2.) 4 h, room temp.
4: 100 percent / KOH / aq. ethanol / 18 h / Heating
5: 1.) p-Toluenesulfonyl chloride, 2.) 1,5-Diazabicyclo<5.4.0>undec-5-ene / 1.) Toluene, 0 deg C, 2.) a) 0 deg C, 15 min, b) 3 h, reflux
With
N,N,N,N,N,N-hexamethylphosphoric triamide; potassium hydroxide; sodium; tetra-(n-butyl)ammonium iodide; toluene-4-sulfonic acid; p-toluenesulfonyl chloride; 1,5-Diazabicyclo[5.4.0]undec-5-ene;
In
methanol; diethyl ether; ethanol;
DOI:10.1021/jo01299a043
- Guidance literature:
-
Multi-step reaction with 4 steps
1: 1.) Na, HMPA, 2.) Tetra-n-butylammonium iodide / 1.) a) THF, 0 deg C, 15 min, b) room temp., 1 h, 2.) 50 deg C, 3 h
2: 96 percent / p-Toluenesulfonic acid / methanol / 1.) 1 h, 0 deg C, 2.) 4 h, room temp.
3: 100 percent / KOH / aq. ethanol / 18 h / Heating
4: 1.) p-Toluenesulfonyl chloride, 2.) 1,5-Diazabicyclo<5.4.0>undec-5-ene / 1.) Toluene, 0 deg C, 2.) a) 0 deg C, 15 min, b) 3 h, reflux
With
N,N,N,N,N,N-hexamethylphosphoric triamide; potassium hydroxide; sodium; tetra-(n-butyl)ammonium iodide; toluene-4-sulfonic acid; p-toluenesulfonyl chloride; 1,5-Diazabicyclo[5.4.0]undec-5-ene;
In
methanol; ethanol;
DOI:10.1021/jo01299a043
