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77-34-9

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77-34-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77-34-9 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 7 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 77-34:
(4*7)+(3*7)+(2*3)+(1*4)=59
59 % 10 = 9
So 77-34-9 is a valid CAS Registry Number.

77-34-9Upstream product

77-34-9Downstream Products

77-34-9Relevant articles and documents

spiral steroid alkali alkane xylosides alkloids method for the synthesis of (by machine translation)

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Paragraph 0119; 0120, (2017/04/11)

The invention discloses a convergent spiral steroid alkali alkane xylosides alkaloid chemical synthesis method, the method comprises the following steps: (a) the 3?Hydroxy acyl silicon-based or for the protection of sapogenin spiral steroid (II) into the corresponding 16?Acetoxy?22?Carbonyl?26?(III) hydroxyl gallbladder gonanes; (b) 3?Hydroxy silicon-based or acyl group protection for 16?Acetoxy?22?Carbonyl?26?Preparation of sulfonic acid ester gallbladder gonanes (IV); (c) 3?Hydroxy silicon-based or acyl group protection for 16?Acetoxy?22?Carbonyl?26?Preparation of azide interior gonanes (V); (d) (VI) spiral steroid alkali alkane sapogenin the preparation; (e) acyl protecting spiral steroid alkali alkane xylosides alkloids preparation (VII); (f) spiral steroid alkali alkane xylosides alkloids (I) of the preparation. The preparation method of this invention simple process, high yield, has strong utility value. (by machine translation)

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