(R)-(+)-3-Hydroxy-2-methoxycarbonyl-8-methyl-8-azoniabicyclo[3.2.1]octaneL-bitartrate

(R)-(+)-3-Hydr­oxy-2-methoxy­carbonyl-8-methyl-8-azoniabicyclo­[3.2.1]octane l-bitartrate

(RS)-(±)-2-Methoxy-carbonyl-3-tropinone is an important inter-mediate for the preparation of cocaine and its derivatives. The molecule in the title compound, C(10)H(16)NO(3) (+)·C(4)H(5)O(6) (-), is present as the enol tautomer. The six-membered ring adopts a half boat conformation, and the five-membered ring a slightly distorted envelope conformation. There are intra- and inter-molecular hydro...

( 3 aR , 8 b 8 , 5 ' R ) 3 - [ ( 2 , 5 -

8-Hydroxy-2-methylquinoline

The asymmetric unit of the title compound, C(10)H(9)NO, contains two independent mol-ecules which are linked by a pair of O-H⋯N hydrogen bonds into a hydrogen-bonded dimer.

2-Chloro-8-methyl-3-[(pyrimidin-4-yl­oxy)meth­yl]quinoline

In the title compound, C(15)H(12)ClN(3)O, the quinoline ring system is essentially planar, with a maximum deviation of 0.017 (1) Å. The crystal packing is stabilized by π-π stacking inter-actions between the quinoline rings of adjacent mol-ecule, with a centroid-centroid distance of 3.5913 (8) Å. A weak C-H⋯π contact is also observed between mol-ecules.

SYNTHESIS OF 8-HYDROXY-6-METHOXY- 3-UNDECYLISOCOUMARIN AND 2-HY DROXY - 4-METHOXY-6-(2-OXOTRIDECYL) BENZOIC ACID

Straightforward conversion of (+)-6,8-dimethoxy-3,4-dihydro-3- undecylisocoumarin (3) to the title isocoumarin was carried out. Hydrolytic ring opening of (3) afforded the hydroxy acid (4) which was immediately oxidized to keto acid (5) using chromic acid, Cyclodehydration of (5) afforded the 6,8- dimethoxy-3-undecylisocoumarin (6) which on selective demethylation of 8- methoxy group furni...