Claims
- 1. A compound of the formula ##STR11## wherein R.sub.1 is an acid protecting group which is stable at a pH which is more acidic than pH [2 and R.sub.2 is a leaving group capable of leaving under aqueous acidic conditions.
- 2. The compound of claim 1 in which R.sub.1 is acid stable at a pH of from 0.5 to 2.
- 3. The compound of claim 1 wherein R.sub.1 is benzyl.
- 4. The compound of claim 1 wherein R.sub.2 is acetoxy, chloro or bromo.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1650/76 |
Feb 1976 |
CHX |
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Parent Case Info
This is a division of application Ser. No. 765,560, filed Feb. 4, 1977 issued as U.S. Pat. No. 4,079,065, on Apr. 13, 1978.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3943151 |
Corey et al. |
Mar 1976 |
|
3952019 |
Peel et al. |
Apr 1976 |
|
4020172 |
Peel et al. |
Apr 1977 |
|
Non-Patent Literature Citations (1)
Entry |
Chem. Abstracts, vol. 85, 3496cs. |
Divisions (1)
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Number |
Date |
Country |
Parent |
765560 |
Feb 1977 |
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