The present invention relates to a process for the preparation of enaminocarbonyl compounds of the formula where compounds of the formula are reacted in the presence of a Br\xf8nsted acid to give compounds of the formula, and A, R1 and Z are as defined in the description, and also corresponding starting compounds which are used in the process according to the invention. During such a load increase, the quality of service of the application having the user focus will decrease until the device detects the load increase. In the folding operation, binary data from a single word line is folded into a multi-state format and, when rewritten in multi-state form, is written into a only a portion of another word line. for a time between approximately 3 minutes and approximately 35 minutes; subsequent anodization may be performed by immersing the slug in an electrolyte at a temperature between approximately 15\xb0 C. The ribbon has a cross-sectional area of 25,000 \u03bcm2 to 800,000 \u03bcm2. The method comprises introducing an electrical stimulation lead within the patient’s head, advancing the stimulation lead within an intracranial vascular body, such as a blood vessel or ventricle, placing the stimulation lead adjacent the fastigium nucleus of the patient’s brain, and stimulating the fastigium nucleus with the stimulation lead to treat the neurological disorder.