you might as well just hydrolyzed the urea in HCl. That sounds much simpler to me.
Refs on the pseudo-Ritter reaction mentioned above:
Org Syn CV III, 151
http://www.orgsyn.org/orgsyn/prep.asp?prep=cv3p0148 (http://www.orgsyn.org/orgsyn/prep.asp?prep=cv3p0148)
(very awesome reaction in several ways)
{{Other Refs}}
On tertiary alcohols:
USPT 2247495
CR Hebd. Seances Acad. Sci 228; 1949, 1656
Zh. Obshch. Khim. 29; 1959, 174. English version pg. 177
Collect. Czech. Chem. Commun. 41; 1976, 1557
Pesticide Science 55; 1999, 1229
On tertiary alkenes:
Uc. Zap. Azerbajdzansk. Univ. 5; 1958, 47
(Chem. Abstr. 1959, 18860)
USPT 2849488
USPT 2548585
Zh. Org. Khim. 5; 1969, 254 (english 244)